STOCK PURCHASE AGREEMENT

     This ISONICS CORPORATION'S STOCK PURCHASE AGREEMENT (the "Agreement") is
made and entered into this 1st day of February, 2001, by and between INTERPRO
ZINC LLC, a Colorado limited liability corporation ("Buyer") and ISONICS
CORPORATION, a California corporation ("Seller"), the 100% stockholder of
International Process Research Corporation, a Colorado corportion ("IPRC").
(Seller and Buyer may collectively be referred to herein as the "Parties" or in
the singular as "Party.")

                                    RECITALS

     Seller desire to sell and Buyer desires to purchase all of the issued and
outstanding capital stock, whether common or preferred, and of any class, of
IPRC (collectively, the "Shares") and certain assets of Isonics, (the "Other
Assets") set forth on Exhibit A, attached hereto and incorporated herein
pursuant to the terms and conditions set forth herein.

                                    AGREEMENT

     NOW THEREFORE, pursuant to the foregoing recitals and in consideration of
the mutual covenants contained herein, Buyer and Seller agree as follows:

                                    SECTION 1
                      SALE AND TRANSFER OF SHARES; CLOSING

     1.1  SHARES. At the Closing (as hereinafter defined), Seller shall sell,
transfer and deliver to Buyer, and Buyer will purchase from Seller, the Shares
and the Other Assets on the terms set forth in Section 1.4(b), below:.

     1.2  CLOSING DATE. The closing of the purchase and sale of the Shares
provided by this Agreement (the "Closing") shall take place at Moye Giles
O'Keefe Vermeire & Gorrell, LLP on February 1. 2001 at 9:00 a.m. (the "Closing
Date"). The Closing shall be effective as of 12:01 a.m. on February 1, 2001.

     1.3  CLOSING OBLIGATIONS. At the Closing:

          a.   Seller will deliver to Buyer (collectively, the "Seller's Closing
     Documents"):

               (1)  Certificates registered in Seller's names representing the
                    Shares, duly endorsed to Buyer (or accompanied by duly
                    executed stock powers);

               (2)  An Indemnity Agreement for the liabilities of IPRC to be
                    assumed by Buyer, executed by the parties on February 1,
                    2001;

               (3)  A certificate executed by Seller representing and
                    warranting, except as otherwise stated in such certificate
                    or on any Disclosure



                    Schedules (as hereinafter defined) delivered after the date
                    of this Agreement but prior to the Closing, that each of
                    Seller's representations and warranties in this Agreement
                    was accurate in all respects as of the date of this
                    Agreement and is accurate in all respects as of the Closing
                    as if made on the Closing Date;

               (4)  Such written consents of the board of directors and/or
                    shareholders of IPRC as may be necessary to reflect the
                    resignation of the existing directors of IPRC, not including
                    Dr. Cuttriss;

               (5)  Termination statements or releases of any and all liens or
                    encumbrances on IPRC's assets unless otherwise waived by
                    Buyer;

               (6)  IPRC's financial statements for year end April 30, 2000 and
                    quarterly financial statements for the period ended January
                    31, 2001 and such later income statements and balance sheets
                    as may be reasonably available (the "Closing Financial
                    Statements"); and

               (7)  Except to the extent previously delivered, the additional
                    documents required to be delivered by Seller to Buyer
                    pursuant to this Agreement.

          b.   Buyer will deliver to Seller (collectively, the "Buyer's Closing
     Documents"):

               (1)  A membership interest in the Buyer representing 25% of the
                    Buyer's equity, subject to the Buyer's operating agreement;

               (2)  An assumption and indemnification agreement for the
                    liabilities of IPRC to be assumed by Buyer, as specified in
                    Exhibit B attached hereto and incorporated herein;

               (3)  A certificate executed by Buyer to Seller representing and
                    warranting, except as otherwise stated in such certificate,
                    that each of Buyer's representations and warranties in this
                    Agreement was accurate in all respects as of the date of
                    this Agreement and is accurate in all respects as of the
                    Closing as if made on the Closing Date;

               (4)  Except to the extent previously delivered, the additional
                    documents required to be delivered by Buyer to Seller
                    pursuant to this Agreement.

                                    SECTION 2

     [This Section intentionally left blank]

                                       2


                                    SECTION 3
                    REPRESENTATIONS AND WARRANTIES OF SELLER

     Seller represents and warrants to Buyer, on behalf of IPRC and Seller, as
of the Closing Date, except as set forth on Seller's schedules described below
in this Section 3 (collectively, the "Disclosure Schedules") attached hereto and
incorporated herein by this reference, as follows. When used herein, the term
"to the knowledge of Seller" means the actual knowledge, without further
inquiry, of any of the officers of the Seller or the knowledge of any of the
directors of the Seller who are not participating in this transaction as a
member of, or prospective lender to, the Buyer.

     3.1  AUTHORITY; NO CONFLICT.

          a.   This Agreement and the documents listed below constitute or will
     constitute the legal, valid and binding obligations of Seller, enforceable
     against Seller in accordance with their terms, except as such may be
     subject to or limited by applicable bankruptcy, insolvency or other similar
     laws and interpretations or affecting the rights and remedies of creditors
     generally or the effect of general principles of equity (regardless of
     whether enforcement is considered in proceedings at law or equity) and
     public policy and Seller have the absolute and unrestricted right, power,
     authority and capacity to execute and deliver the Closing Documents to
     Buyer.

          b.   To the knowledge of the Seller, neither the execution and
     delivery of this Agreement nor the consummation or performance of any of
     the transactions contemplated herein will directly or indirectly (with or
     without notice or lapse of time):

               (1)  contravene, conflict with, or result in a violation of any
                    provision of the organizational documents of IPRC or any
                    resolution adopted by the board of directors of IPRC;

               (2)  contravene, conflict with or result in a violation of, or
                    give any governmental body or other person the right to
                    challenge any of the transactions contemplated herein or to
                    exercise any remedy or obtain any relief under, any law or
                    any order to which IPRC or Seller or any of the assets owned
                    or used by IPRC, may be subject;

               (3)  contravene, conflict with, or result in violation of any of
                    the terms or requirements of, or give any governmental body
                    the right to revoke, withdraw, suspend, cancel, terminate,
                    or modify, any governmental authorization that is held by
                    IPRC or integral to IPRC's operations, or any of the assets
                    owned or used by IPRC;

                                       3


               (4)  cause IPRC to become subject to, or to become liable for the
                    payment of, any transfer tax, except that no representation
                    is given with respect to any sales taxes that may be due (if
                    any) to the extent this transaction involves the transfer of
                    any assets on which sales taxes may be due;

               (5)  contravene, conflict with or result in violation or breach
                    of any provision of, or give any person the right to declare
                    a default or exercise any remedy under, or to accelerate the
                    maturity or performance of, or to cancel, terminate, or
                    modify any of IPRC's contracts which would have a material
                    adverse effect on the business of IPRC; or

               (6)  result in the imposition or creation of any encumbrance upon
                    any of the assets owned or used by IPRC, except as qualified
                    in Paragraph 3.1(b)(4), above.

     3.2  ORGANIZATION AND GOOD STANDING. IPRC is, and at the Closing will be, a
corporation duly organized, validly existing and in good standing under the laws
of the State of Colorado, with full corporate power and authority to conduct its
business as it is now being conducted, to own or use the properties and assets
that it purports to own or use and to perform all its obligations under its
contracts. To the best knowledge of Seller, IPRC does not have any business in
foreign jurisdictions that would require it to qualify to do business as a
foreign corporation in such foreign jurisdictions, except where such failure to
qualify to do business would not have a material adverse effect on the business
of IPRC.

     3.3  CORPORATE GOVERNANCE. To the best knowledge of Seller has delivered to
Buyer copies of IPRC's organizational documents, as currently in
effect.

     3.4  CAPITALIZATION.

          a.   The Seller has not caused IPRC to issue any shares of its capital
     stock or options or other rights to acquire any shares of its capital stock
     since the time the Seller acquired IPRC. To the best knowledge of the
     Seller the Shares constitute the total outstanding capital stock of IPRC.

          b.   Seller is and will be on the Closing Date the record and
     beneficial owner and holder of the Shares, free and clear of all mortgages,
     pledges, liens, security interests, conditional sale agreements, charges,
     encumbrances and other restrictions except such restrictions imposed by
     federal and state securities laws.

                                       4


          c.   The issuance and delivery of the Shares is not subject to any

     other preemptive or any other similar rights of any person and to the
     knowledge of the Seller, there are no options, warrants or other rights to
     purchase stock of IPRC currently outstanding.

          d.   IPRC has no subsidiaries or investments in any other entities.

     3.5  LITIGATION. To the knowledge of Seller, there are no actions, suits,
proceedings or to Seller's knowledge investigations pending or threatened
against IPRC or any of its properties before or by any court or arbitrator or
any governmental body, agency or official or any other person which could have a
material adverse effect on IPRC's properties or assets or the business of IPRC
as presently conducted or that may have the effect of preventing, delaying,
making illegal or otherwise interfering with any of the transactions
contemplated in this Agreement.

     3.6  INCOME STATEMENT AND BALANCE SHEET. Seller has delivered to Buyer
IPRC's balance sheets (which are not audited) as of April 30, 2000, and October
31, 2000, and the statement of income (which is not audited) for the six months
ended October 31, 2000. Such statements fairly present the financial condition
and the results of operations, of IPRC at each of the respective dates of such
balance sheets, all in accordance with generally accepted accounting principles
("GAAP"). Such statements reflect the consistent application of IPRC's
accounting principles throughout the periods involved. The income statements and
balance sheets described in this Section have been prepared based substantially
on information provided by representatives of the Buyer in their capacity as
employees of the Seller.

     3.7  OWNERSHIP AND TRANSFER OF ASSETS OF IPRC.

          a.   Seller warrants that, to the knowledge of Seller, IPRC has a
     valid leasehold interest in that certain property located at 5906 McIntyre
     Street, Golden, Colorado 80403 pursuant to a lease which expires on July 1,
     2002 (the "Premises"). Seller warrants that to the knowledge of Seller,
     IPRC owns or has a valid leasehold interest in all other personal property
     and tangible assets presently located on the Premises that are used in
     conducting IPRC's business and all other personal property and tangible
     assets purchased by IPRC since the date of this Agreement through the
     Closing Date (the "Personal Property").

          b.   To the knowledge of Seller, the Premises and the Personal
     Property are owned free and clear of all mortgages, pledges, liens,
     security interests, conditional sale agreements, charges, encumbrances and
     other restrictions or are leased pursuant to a valid lease and are not, in
     the case of real property, subject to any rights of way, building use
     restrictions, exceptions, variances, reservations or limitations of any
     nature except for liens for current taxes or special assessments not yet
     due and payable, easements, covenants or other restriction of record, and
     any building or zoning ordinances currently in effect.

     3.8  NO UNDISCLOSED LIABILITIES. To the knowledge of Seller, IPRC has no
known liabilities or obligations of any nature (whether absolute, accrued, or
contingent) except for

                                       5


liabilities or obligations reflected or reserved against on the Closing
Financial Statements and current liabilities incurred in the ordinary course of
business since the date thereof except certain liabilities for the reclamation
of the Premises.

     3.9  TAXES.

          a.   IPRC's taxes have been consolidated with the Seller's taxes on
     the Seller's consolidated returns, and Seller has paid or made provision
     for payment of all taxes and related charges that have or may have become
     due and payable as of December 31, 2000 pursuant to those tax returns or
     pursuant to any assessment received by Seller or IPRC.

          b.   No consent to the application of Section 341(f)(2) of the IRC has
     been filed by Seller with respect to any property or assets held, acquired,
     or to be acquired by IPRC.

          c.   To the Seller's knowledge, all taxes that IPRC is or was required
     by law to withhold or collect as of December 31, 2000 have been duly
     withheld or collected and, to the extent required, have been paid to the
     proper governmental body or other person.

     3.10 EMPLOYEE BENEFITS.

          a.   There are no employees of IPRC. All persons who administered and
     performed the business of IPRC prior to Closing were employees of Isonics.
     IPRC does not provide health or welfare benefits for any retired or former
     employee and is not obligated to provide health or welfare benefits to any
     active employee following such employee's retirement or other termination
     of service except as required by law.

          b.   Seller has certain "Multi-Employer Plan" as defined under the
     Employee Retirement Income Security Act "ERISA" Section 3(37)(A), "Pension
     Plan" as defined under ERISA Section 3(2)(A), "Plan" as defined under
     ERISA Section 3(3), "Qualified Plan" which meets the requirements of IRC
     Section 401(a), Pension Plan that is subject to Title IV of ERISA 29 USC
     Section 1301 et seq., "Voluntary Employees' Beneficiary Association" under
     IRC Section 501(c)(9), Welfare Plan as defined under ERISA Section 3(1),
     or any other obligations, arrangements, or customary practices, whether
     or not legally enforceable, to provide benefits, other than salary, as
     compensation for services rendered, to present or former directors,
     employees or agents (including but not limited to consulting agreements
     under which the compensation paid does not depend upon the amount of
     service rendered, sabbatical policies, severance payment policies or
     post-retirement benefits), except those set forth on Schedule 3.12
     (collectively, the "Isonics Plans").

          c.   Isonics has performed all of its material obligations under
     Isonics' Plans and has made all appropriate entries in its financial
     records and statements for all known obligations and liabilities under the
     Isonics Plans that have accrued as of January 31, 2000 but are not due.

          d.   The consummation of this Agreement will not result in the
     payment, vesting or acceleration of any benefit to employees under the
     Isonics' Plans.

                                       6


     3.11 COMPLIANCE WITH LEGAL REQUIREMENTS; GOVERNMENTAL AUTHORIZATIONS.

          a.   To the knowledge of Seller, IPRC is and at all times has been in
     material compliance with applicable law in the conduct or operation of its
     business or the ownership or use of any of its assets except where such
     noncompliance would not have a material adverse effect on the business of
     IPRC and except for the remediation obligation for the Premises.

          b.   To the knowledge of Seller, no event has occurred or circumstance
     exists that (1) may constitute or result in violation by IPRC of or a
     failure on the part of IPRC to comply with applicable law, which would have
     a material adverse effect on the business of IPRC; or (2) may give rise to
     any obligation on the part of IPRC to undertake or to bear all or any
     portion of the cost of any removal, remedial, corrective or clean-up action
     of any material nature.

          c.   To the knowledge of Seller, IPRC has not received within the last
     three years, any notice or other communication (whether oral or written)
     from any governmental body or any written notice from any other person
     regarding (1) any actual, alleged, possible or potential violation of, or
     failure to comply with any applicable law or (2) any actual, alleged,
     possible or potential obligation of IPRC to undertake or to bear all or any
     portion of the cost of any removal, remedial, corrective or clean up action
     of any nature.

     3.12 ABSENCE OF CERTAIN CHANGES AND EVENTS.

          a.   Since December 20, 2000, the Seller has not caused IPRC to
     conduct its business other than in the ordinary course of business
     consistent with past practices and (except as contemplated by this
     Agreement or except as contemplated by the reorganization of IPRC
     accomplished May 1, 2000), there has not been any:

               (1)  payment or increase by IPRC of any bonuses, salaries or
                    other compensation to any stockholder, director, officer or
                    employee other than in the ordinary course of business or
                    entry into any employment, severance or similar contract
                    with any director, officer or employee other than in the
                    ordinary course of business;

               (2)  entry into, termination of, or receipt of written notice of
                    termination of (i) any license, distributorship, dealer,
                    sales representative, joint venture, credit or similar
                    agreement or (ii) any contract or transaction except in the
                    ordinary course of business;

               (3)  sale, lease or other disposition of any asset or property of
                    IPRC other than in the ordinary course of business or
                    mortgage, pledge or imposition of any lien or other
                    encumbrance on any material

                                       7


                    asset or property of IPRC, other than in the ordinary course
                    of business, including the sale, lease or other disposition
                    of any of IPRC's intellectual property ;

               (4)  cancellation or waiver of any claims or rights with a
                    cumulative value to IPRC in excess of $50,000;

               (5)  agreement, whether oral or written, by IPRC to do any of the
                    foregoing; and

               (6)  material adverse change in the business, financial
                    condition, net worth or results of operations of IPRC, other
                    than changes occurring in the ordinary course of business
                    which changes have not, individually or in the aggregate,
                    had a material adverse effect on the business, properties or
                    financial condition of IPRC (except in connection with the
                    June, 2001 payment obligation of IPRC in connection with the
                    acquisition of the Fray Patents).

     3.13 CONTRACTS; NO DEFAULTS.

          a.   To the knowledge of the Seller, IPRC is in material compliance
     with all material terms and requirements of each contract material to IPRC
     under which IPRC has any obligation or liability or by which IPRC or any of
     its assets is bound and the Seller has been delinquent in making certain
     payments (in Seller's stock and cash) to certain assignors of the Fray
     Patents, which payments shall be made by Seller prior to Closing or
     promptly following the Closing, in no event these payments will occur no
     later than February 28, 2001.

          b.   To Seller's knowledge, each other person that has any obligation
     or liability under any contract material to IPRC, is in material compliance
     with all material terms and requirements of each such Contract under which
     IPRC has any obligation or liability or by which IPRC or any of its assets
     is bound except that exemptions from registration for the issuance of
     shares for assignment of the Fray Patents has not been established in all
     cases, but shall be obtained by Seller (with the participation and
     cooperation of the principals of IRPC post-Closing.

          c.   To Seller's knowledge, each contract material to IPRC is in full
     force and effect and is valid and enforceable.


     3.14 INTELLECTUAL PROPERTY. Post-Closing, Isonics will issue: 50,000 shares
of restricted common stock to Dr. Derek John Fray in connection with the
assignment to Buyer of certain patent rights held by Dr. Fray (the "Fray
Patents"), and further, prior to Closing or promptly thereafter Isonics will
issue, 20,000 shares to Mr. Chazen 5,000 shares to Cato Research in

                                       8


satisfaction of its obligations to acquire the Fray patents, and will pay
$10,000 to Cato Research in fulfillment of a portion of its cash payment
obligations to acquire the Fray patents, as set forth in Section 3.13(a) herein.

     3.15 DISCLOSURE.

          a.   No representation or warranty of Seller or IPRC in this Agreement
     omits to state a material fact necessary to make the statements herein, in
     light of the circumstances in which they were made, not materially
     misleading.

          b.   There is no material fact known to Seller that has specific
     application to Seller or IPRC (other than general economic or industry
     conditions) that materially adversely affects or materially threatens, the
     assets, financial condition, or results of operations of IPRC as currently
     conducted that has not been set forth in this Agreement or the Disclosure
     Schedules hereto.

     3.16 NO DEBT. IPRC has no long-term interest bearing debt other than as
reflected on the Closing Financial Statements or incurred in the ordinary course
of business thereafter.

     3.17 NO DISTRIBUTION OR DIVIDEND. IPRC has made no distribution or dividend
after December 31, 2000.

     3.18. BROKERS OR FINDERS. Seller or its agents have incurred no obligation
or liability, contingent or otherwise for Buyer or IPRC, for brokerage or
finders' fees or agents' commissions or other similar payments in connection
with this Agreement.

                                    SECTION 4
                     REPRESENTATIONS AND WARRANTIES OF BUYER

         Buyer represents and warrants to Seller as follows:

     4.1  ORGANIZATION. Buyer is a newly organized limited liability company in
good standing under Colorado law (the only jurisdiction in which it is required
to be in good standing) and has engaged in no business activity, and has
incurred no debt, except to negotiate this Agreement and to complete its
obligations hereunder.

     4.2  FINANCIAL CAPABILITY. The Buyer will have at the Closing Date
available working capital of not less than $300,000, or, to the extent such
working capital is not represented by funds on deposit, Buyer reasonably expects
that its members will contribute sufficient funds in the form of equity or debt
(which must provide for full personal recourse against the debtor) to provide
for available working capital of not less than $300,000.

                                       9


     4.3  DISCLOSURE. No representation or warranty of Buyer in this Agreement
omits to state a material fact necessary to make the statements herein, in light
of the circumstances in which they were made, not materially misleading. There
is no material fact known to Buyer that has specific application to Buyer (other
than general economic or industry conditions) that materially adversely affects
or materially threatens, the assets or financial condition of Buyer.

     4.4  SOLVENCY. Immediately after giving effect to the transactions
contemplated by this Agreement, Buyer and IPRC shall be able to pay their
respective debts as they become due and shall own property which has a fair
saleable value greater than the amounts required to pay its debts and Buyer and
IPRC shall have adequate capital to carry on its business and to pay its
obligations as they become due, including but not limited to its obligations to
indemnify the Seller in certain circumstances as set forth herein. No transfer
of property is being made and no obligation is being incurred by Buyer or IPRC
with the intent to hinder, delay or defraud present or future creditors of Buyer
or IPRC including but not limited to Seller.

     4.5  BROKERS OR FINDERS. Buyer and its officers and agents have incurred no
obligation or liability, contingent or otherwise, for brokerage or finders' fees
or agents' commissions or other similar payment in connection with this
Agreement and will indemnify and hold Seller harmless from any such payment
alleged to be due by or through Buyer as a result of the action of Buyer or its
officers or agents.

                                    SECTION 5
                               COVENANTS OF SELLER

     5.1  ACCESS AND INVESTIGATION. Between the date of this Agreement and the
Closing, Date, Seller will, and will cause IPRC and its representatives to, (a)
afford Buyer and its representatives and prospective lenders and their
representatives (collectively, "Buyers Advisors") reasonable access to IPRC's
properties, contracts, books and records and other documents and data; (b)
furnish Buyer and Buyer's Advisors with copies of all such contracts, books and
records and other existing documents and data as Buyer may reasonably request;
and (c) furnish Buyer and Buyer's Advisors with such additional financial,
operating and other data and information as Buyer may reasonable request.

     5.2  OPERATION OF BUSINESS. Between the date of this Agreement and the
Closing Date, Seller will, and will cause IPRC to:

          a.   Conduct the business of IPRC only in the ordinary course of
     business; and

          b.   Use commercially reasonable efforts to preserve intact the
     current business organization of IPRC, keep available the services of the
     current officers, employees and agents of IPRC, and maintain the relations
     and good will with suppliers, customers, landlords, creditors, employees,
     agents and others having business relationships with IPRC.

                                       10


     5.3  NOTIFICATION. Between the date of this Agreement and the Closing Date,
Seller will promptly notify Buyer in writing if Seller or IPRC becomes aware of
any fact or condition that causes or constitutes a breach of any of Seller's or
IPRC's representations and warranties as of the date of this Agreement, or if
Seller or IPRC becomes aware of the occurrence after the date of this Agreement
of any fact or condition that would cause or constitute a breach of any such
representation or warranty had such representation or warranty been made as of
the time of occurrence or discovery of such fact or condition. Buyer
acknowledges that as of the date of this Agreement, Seller has not delivered
their Disclosure Schedules which shall be delivered prior to Closing and shall
disclose certain facts and conditions that are and will be exceptions to the
representations and warranties.

     5.4  NO NEGOTIATION.

          a.   Until such time, if any, as this Agreement is terminated as
     provided herein, Seller will not, and will cause IPRC and its
     representatives not to, directly or indirectly, solicit, initiate or
     encourage inquiries or proposals from, discuss or negotiate with, provide
     any non-public information to, or consider the merits of any unsolicited
     inquires or proposals from, any person (other than Buyer) relating to any
     transaction involving the sale of IPRC's business or its assets (other than
     in the ordinary course of business) or any capital stock of IPRC or any
     merger, consolidation, business combination or similar transaction
     involving IPRC.

          b.   If Seller breaches Section 5.4(a) and, thereafter, Seller or IPRC
     enter into a letter of intent or other agreement relating to the
     acquisition of a material portion of the Shares or the assets of IPRC, in
     whole or in part, whether directly or indirectly, through purchase, merger,
     consolidation, or otherwise and such transaction is consummated, then
     immediately upon the closing of such transaction, Seller will pay to Buyer
     the sum of Two Hundred and Fifty Thousand Dollars ($250,000) as and for
     liquidated damages as a result of such breach.

     5.5  COMMERCIALLY REASONABLE EFFORTS. Between the date of this Agreement
and the Closing Date, Seller will use commercially reasonable efforts to cause
the conditions to Closing to be satisfied.

                                    SECTION 6
                       COVENANTS OF BUYER PRIOR TO CLOSING

     6.1  COMMERCIALLY REASONABLE EFFORTS. Between the date of this Agreement
and the Closing Date, Buyer will use commercially reasonable efforts to cause
the conditions to Closing to be satisfied.

     6.2  NOTIFICATION. Between the date of this Agreement and the Closing Date,
Buyer will promptly notify Seller in writing if Buyer becomes aware of any fact
or condition that causes or constitutes a breach of any of Buyer's
representations and warranties as of the date of this Agreement, or if Buyer
becomes aware of the occurrence after the date of this Agreement of any fact or
condition that would cause or constitute a breach of any such representation or

                                       11


warranty had such representation or warranty been made as of the time of
occurrence or discovery of such fact or condition.

                                    SECTION 7
               CONDITIONS PRECEDENT TO BUYER'S OBLIGATION TO CLOSE

     Buyer's obligation to purchase the Shares and to take the other actions
required to be taken by Buyer at the Closing is subject to the satisfaction, at
or prior to the Closing, of each of the following conditions (any of which may
be waived by Buyer, in whole or in part):

     7.1  PATENT OBLIGATIONS. Prior to or promptly following Closing as set
forth in Section 3.13(a) hereing, Isonics will issue 20,000 shares of Isonics
stock to Mr. Chazen and 5,000 shares to Cato Research in satisfaction of its
obligations to acquire the North American rights to the Fray patents, and will
pay $10,000 to Cato Research in fulfillment of a portion of its cash payment
obligations to acquire such patent rights.

     7.2  ACCURACY OF REPRESENTATIONS. All of Seller' representations and
warranties in this Agreement (considered collectively) and each of these
representations and warranties (considered individually), must have been
accurate in all material respects as of the date of this Agreement and must be
accurate in all material respects as of the Closing Date as if made on the
Closing Date subject to the Disclosure Schedules. Buyer acknowledges that as of
the date of this Agreement, Seller have not delivered their Disclosure Schedules
which shall be delivered prior to Closing and shall disclose certain facts and
conditions that are and will be exceptions to the representations and
warranties.

     7.3  ADDITIONAL DOCUMENTS. Seller shall have delivered to Buyer such other
documents as Buyer may reasonably request for the purpose of

          (a)  evidencing the accuracy of any of Seller' representations and
     warranties; or

          (b)  otherwise facilitating the consummation or performance of any of
     the transactions contemplated herein;

     7.4  ADDITIONAL DOCUMENTS. The Parties shall have agreed and accepted all
additional documents required to be delivered pursuant to this Agreement.

                                       12


                                    SECTION 8
               CONDITIONS PRECEDENT TO SELLER' OBLIGATION TO CLOSE

     Seller's obligation to sell the Shares and to take the other actions
required to be taken by Seller at the Closing is subject to the satisfaction, at
or prior to the Closing, of each of the following conditions (any of which may
be waived by Seller, in whole or in part):

     8.1  ACCURACY OF REPRESENTATIONS. All of Buyer's representations and
warranties in this Agreement (considered collectively) and each of these
representations and warranties (considered individually), must have been
accurate in all material respects as of the date of this Agreement and must be
accurate in all material respects as of the Closing Date as if made on the
Closing Date.

     8.2  ADDITIONAL DOCUMENTS. Buyer shall have delivered to Seller such other
documents as Seller may reasonably request for the purpose of:

          a.   evidencing the accuracy of any of Buyer's representations and
     warranties; or

          b.   agreements acceptable to the Seller by which the Buyer will have
     assumed the Seller's obligations as set forth in the Indemnity Agreement
     executed by the parties on February 1, 2001, and as set forth in the
     "Release and Termination of Employment Agreement" executed in conjunction
     with this Closing.

          c.   otherwise facilitating the consummation or performance of any of
     the transactions contemplated herein.

     8.3  BUYER'S PERFORMANCE. Buyer must have delivered each of the documents
required to be delivered by Buyer pursuant to this Agreement or reasonably
requested by Seller or Seller' agents or representatives and must have made the
cash payment required to be made by Buyer pursuant to this Agreement.

     8.4  CONSENTS. Each of the consents required to be obtained by Buyer
pursuant to this Agreement have been obtained and are in full force and effect.

     8.5  ADDITIONAL DOCUMENTS. The Parties shall have agreed and accepted all
additional documents required to be delivered pursuant to this Agreement.

                                    SECTION 9
                                   TERMINATION

     9.1  TERMINATION EVENT. This Agreement may, by notice given prior to or at
the Closing, be terminated:

                                       13


          a.   by either Buyer or Seller if a material breach of any provision
     of this Agreement has been committed by the other Party and such breach has
     not been waived.

          b.   by Buyer if any of the conditions in Section 7 has not been
     satisfied as of the Closing Date or if satisfaction of any such condition
     is or becomes impossible (other than through the failure of Buyer to comply
     with its obligations under this Agreement) and Buyer has not waived such
     condition on or before the Closing Date;

          c.   by Seller, if any of the conditions in Section 8 has not been
     satisfied as of the Closing Date or if satisfaction of any such condition
     is or becomes impossible (other than through the failure of Seller to
     comply with their obligations under this Agreement) and Seller have not
     waived such condition on or before the Closing Date;

          d.   by mutual consent of Buyer and Seller; and

          e.   by either Buyer or Seller if the Closing has not occurred (other
     than through the failure of any party seeking to terminate this Agreement
     to comply fully with its obligations under this Agreement) on or before
     February 7, 2001, or such later date as the Parties may agree upon in
     writing.

     9.2  EFFECT OF TERMINATION. Each Party's right of termination under this
Section is in addition to any other rights it may have under this Agreement or
otherwise, and the exercise of a right of termination will not be an election of
remedies. If this Agreement is terminated pursuant to this Section, all further
obligations in Section 13.3 will survive; provided, however, that if this
Agreement is terminated by a Party because of the breach of this Agreement by
the other Party or because one or more of the conditions to the terminating
Party's obligations under this Agreement is not satisfied as a result of the
other Party's failure to comply with its obligations under this Agreement, the
terminating Party's right to pursue all legal remedies will survive such
termination unimpaired.

                                   SECTION 10
                     POST-CLOSING COVENANTS AND OBLIGATIONS

     10.1 PERSONAL GUARANTEES OF SELLER. Buyer shall use its best efforts to
remove Seller from any and all personal guarantees entered into by Seller and
related to the assets or business of IPRC. Buyer shall indemnify and hold Seller
harmless from any personal guarantees not released by Buyer for liabilities
arising from actions taken or failed to be taken after the Closing Date.

     10.2 FINANCIAL INFORMATION OF BUYER. For so long as Seller has an interest
in the equity of IPRC, Buyer shall cause IPRC to provide Seller with quarterly
financial information of Buyer and IPRC. Seller and their attorneys and
certified public accountants shall have full access to such financial
information of IPRC and Buyer as they shall reasonably request. IPRC or Buyer
shall not restrict or limit any reasonable request for such information by the
foregoing persons.

                                       14


     10.3 MAINTAIN BOOKS AND RECORDS. As long as Isonics maintains membership
interest in Buyer, Buyer shall maintain, and upon reasonable notice from Seller,
make available to Seller or its authorized representatives, the books and
records of IPRC as such may be necessary for any legitimate business purpose.
Seller shall be permitted to make copies of any such books and records as
reasonably necessary, at its sole cost and expense.

     10.4 SELLER'S PATENT OBLIGATIONS. Post-Closing, Seller will issue: 50,000
shares of its restricted common stock to Dr. Derek John Fray in connection with
any post-Closing consummation of the assignment of certain patent rights held by
Dr. John Fray to Buyer.

     10.5 DEVELOPMENT OF FINANCIAL STATEMENTS. Post-Closing, Seller will assist
Buyer and Buyers agent in developing the starting financial statements for IPRC
based on the January 31, 2001 balance sheets and income statements provided by
Seller.

                                   SECTION 11
                            INDEMNIFICATION; REMEDIES

     11.1 SURVIVAL. All of the representations, warranties, covenants and
obligations of the Parties contained in this Agreement, Buyer's Closing
Documents, Seller' Closing Documents and any additional documents required to be
executed pursuant to this Agreement will survive the Closing for a period of
thirty (30) months following the Closing Date, except that the covenants
regarding Seller's post-Closing patent obligations, shall survive until
negotiations for such patents are consummated or abandoned by Buyer, and the
Parties' obligations under their respective noncompetition agreement will
survive for the term of the agreement as specified therein.

     11.2 INDEMNIFICATION AND PAYMENT OF DAMAGES BY SELLER. Seller, jointly and
severally, will indemnify and hold harmless Buyer and its officers and directors
(collectively, the "Indemnified Persons") for, and will pay to the Indemnified
Persons the amount of any direct loss, liability, claim, damage (excluding
incidental and consequential damages) and expense, including reasonable
attorneys' fee (excluding costs of investigation), whether or not involving a
third-party claim (collectively the "Damages"), arising from any breach of any
representation, warranty, covenant or obligation made by Seller in this
Agreement, Seller' Closing Documents or any additional documents executed by
Seller and delivered to Buyer pursuant to this Agreement. The remedies provided
in this Section shall be the exclusive remedy available to Buyer or the other
Indemnified Persons against Seller.

     11.3 INDEMNIFICATION AND PAYMENT OF DAMAGES BY BUYER - ENVIRONMENTAL
MATTERS.

          a.   In addition to the provisions of Section 11.4, Buyer and IPRC,
     jointly and severally, will indemnify and hold harmless Seller and the
     Indemnified Persons for the amount of any Damages (including costs of
     cleanup, containment or other remediation) arising from any environmental,
     health or safety liabilities arising out of or relating to:

                                       15


               (1)  the ownership, operation, or condition at any time on or
                    prior to the Closing Date of IPRC's facilities or any other
                    properties and assets (whether real, personal or mixed and
                    whether tangible or intangible) related to the Environment
                    in which IPRC has or had an interest;

               (2)  any pollutants, contaminants or hazardous substances or
                    materials that were illegally present on IPRC facilities or
                    such other properties and assets of IPRC at any time on or
                    prior to the Closing Date;

               (3)  any pollutants, contaminants or hazardous substances or
                    materials, wherever located, that were generated,
                    transported, stored, treated, released or otherwise handled
                    illegally by IPRC or by any other person for whose conduct
                    they are responsible at any time on or prior to the Closing
                    Date; or

               (4)  any hazardous activities related to pollutants, contaminants
                    or hazardous substances or materials that were illegally
                    conducted by IPRC or by any other person for whose conduct
                    it is responsible.

          b.   Buyer, if Buyer desires upon written notification to Seller, will
     be entitled to control any removal, remedial, corrective or cleanup action
     and any related proceeding with respect to which indemnity may be sought
     under this Section 11.3.

     11.4 INDEMNIFICATION AND PAYMENT OF DAMAGES BY BUYER. Buyer will indemnify
and hold harmless Seller, and will pay to Seller the amount of any Damages
arising from or in connection with any breach of any representation, warranty,
covenant or obligation made by Buyer in this Agreement, Buyer's Closing
Documents or any additional documents executed by Buyer and delivered to Seller
pursuant to this Agreement. The remedies provided in this Section shall be the
exclusive remedy available to Seller against Buyer.

     11.5 PROCEDURE FOR INDEMNIFICATION - THIRD PARTY CLAIMS.

          a.   Promptly after receipt by an indemnified party pursuant to this
     Section 11 of notice of the commencement or a threat of any proceeding
     against it, such indemnified party will, if a claim is to be made against
     an indemnifying party under this Section, give written notice to the
     indemnifying party of the commencement of an action within ten (10) days
     from the date of service on the indemnified party and give written notice
     of a threat of such claim within thirty (30) days of its receipt of such
     notice, but the failure to notify the indemnifying party will not relieve
     the indemnifying party of any liability that it may have to any indemnified
     party,

                                       16


     except to the extent that the indemnifying party demonstrates that it is
     prejudiced by the indemnified party's failure to give such notice.

          b.   If any proceeding referred to in this Section is brought against
     an indemnified party and the indemnified party gives notice to the
     indemnifying party of the commencement of such proceeding, the indemnifying
     party shall be entitled to direct and control such defense of the claim and
     the indemnified party may be entitled to participate in such proceeding at
     the direction and control of legal counsel of the indemnifying party. The
     indemnifying party will not, as long as it diligently conducts such
     defense, be liable to the indemnified party under this Section 11 for any
     fees or expenses of the indemnified party's counsel or any other expenses
     with respect to the defense of such proceeding by the indemnified party. If
     notice is given to an indemnifying party of the commencement or threat of
     any proceeding and the indemnifying party does not, within ten days after
     the indemnified party's notice is given, give notice to the indemnified
     party of its election to assume the defense of such proceeding, the
     indemnified party shall assume such defense, and the indemnifying party
     will be bound by any determination made in such proceeding but any
     compromise or settlement shall be reasonably approved by the indemnifying
     party.

          c.   Notwithstanding the foregoing, if an indemnified party determines
     in good faith that the indemnifying party is not diligently and actively
     pursuing the defense of the claim in good faith, then the indemnified party
     shall provide the indemnifying party of written notice setting forth in
     reasonable detail the indemnified parties' basis for such belief and the
     indemnifying party shall have fifteen days to respond to the indemnified
     parties beliefs. If the indemnifying party fails to respond to such written
     notice, the indemnified party may, by notice to the indemnifying party,
     assume the exclusive right to defend, compromise or settle the proceeding,
     but the indemnifying party will not be bound by any determination of a
     proceeding so defended or any compromise or settlement effected without its
     consent (which may not be unreasonably withheld).

     11.6 PROCEDURE FOR INDEMNIFICATION - OTHER CLAIMS. A claim for
indemnification for any matter not involving a third-party claim may be asserted
by notice to the party from whom indemnification is sought. Such notice of a
potential claim for indemnification shall be delivered to the indemnifying party
within five (5) business days upon the indemnified party's discovery of any
facts that may result in a potential claim for indemnification.

                                   SECTION 12
                             COVENANT NOT TO COMPETE

     12.1 AT CLOSING, THE PARTIES WILL ENTER INTO A MUTUAL NONCOMPETITION
AGREEMENT.

                                       17


                                   SECTION 13
                                  MISCELLANEOUS

     13.1 EXPENSES. Except as otherwise expressly provided in this Agreement,
each Party will bear its respective expenses incurred in connection with the
preparation, execution and performance of this Agreement and the transactions
contemplated herein, including all fees and expenses of agents, representatives,
counsel and accountants.

     13.2 PUBLIC ANNOUNCEMENT. Any public announcement or similar publicity with
respect to this Agreement or the transactions contemplated herein will be
issued, if at all, at or after the Closing or at such other time as mutually
agreed to by the Parties.

     13.3 NOTICES. All notices, consents, waivers and other communications under
this Agreement must be in writing and will be deemed to have been duly given
when (a) delivered by hand (with written confirmation of receipt), (b) sent by
facsimile (with written confirmation of receipt), provided that a copy is mailed
by registered mail, return receipt requested, or (c) when received by the
addressee, if sent by nationally recognized overnight delivery service (receipt
requested), in each case to the appropriate addresses and facsimile numbers set
forth below (or to such other addresses and facsimile numbers as a Party may
designate by notice to the other Parties):

     SELLER:

          Isonics Corporation
          5906 McIntyre Street
          Golden, Colorado 80403
          Attn: Brantley J. Halstead, Vice President - Finance
          Tel: (303) 279-7900
          Fax: (303) 279-7300

          With Copy To:
          Norton-Lidstone, P.C
          Suite 850, the Quadrant
          5445 DTC Parkway
          Greenwood Village, CO 80111
          Tel: (303) 221-5552
          Fax: (303) 221-5553

     BUYER:

          Interpro Zinc LLC
          Attn: Dr. Robert H. Cuttriss
          5906 McIntyre Street
          Golden, Colorado 80403

                                       18


          Fax: (303) 279-7300

          With Copy to:

          Richard F. Mauro, Esq.
          Moye, Giles, O'Keefe, Vermeire & Gorrell LLP
          1225 Seventeenth Street, Suite 2900
          Denver, Colorado 80202
          Fax: (303) 292-4510

     13.4 JURISDICTION; SERVICE OF PROCESS. Any action or proceeding seeking to
enforce any provision of, or based on any right arising out of, this Agreement
may be brought against any of the Parties in the courts of the State of
Colorado, County of Jefferson, or if it has or can acquire jurisdiction, in the
United States District Court for the District of Colorado, and each of the
Parties consents to the jurisdiction of such courts (and of the appropriate
appellate courts) in any such action or proceeding and waives any objection to
venue laid therein.

     13.5 FURTHER ASSURANCES. The Parties agree (a) to furnish upon reasonable
request to each other such further information, (b) to execute and deliver to
each other such other documents as reasonably requested, and (c) to do such
other acts and things, all as the other Party may reasonably request for the
purpose of carrying out the intent of this Agreement and the documents referred
to in this Agreement.

     13.6 WAIVER. The rights and remedies of the parties to this Agreement are
cumulative and not alternative. Neither the failure nor any delay by any Party
in exercising any right, power or privilege under this Agreement or the
documents referred to in this Agreement will operate as a waiver of such right,
power or privilege and no single or partial exercise of any such right, power or
privilege will preclude any other or further exercise of such right, power or
privilege or the exercise of any other right, power or privilege. To the maximum
extent permitted by applicable law (a) no claim or right arising out of this
Agreement or the documents referred to in this Agreement can be discharged by
one Party, in whole or in part, by a waiver or renunciation of the claim or
right unless in writing signed by the other Party; (b) no waiver that may be
given by a Party will be applicable except in the specific instance for which it
is given; and (c) no notice to or demand on one Party will be deemed to be a
waiver of any obligation of such Party or of the right of the Party giving such
notice or demand to take further action without notice or demand as provided in
this Agreement or the documents referred to in this Agreement.

     13.7 ENTIRE AGREEMENT AND MODIFICATION. This Agreement supercedes all prior
agreements between the Parties with respect to its subject matter including
Buyer's Letter of Intent dated December 20, 2000 and constitutes (along with the
documents referred to in this Agreement) a complete and exclusive statement of
the terms of the agreement between the Parties with respect to its subject
matter. This Agreement may not be amended except by a written agreement executed
by the Party to be charged with the amendment.

                                       19


     13.8 ASSIGNMENTS, SUCCESSORS AND NO THIRD PARTY BENEFICIARIES. Neither
Party may assign any of its rights under this Agreement without the prior
consent of the other parties except that Buyer may assign any of its rights
under this Agreement to any subsidiary of Buyer; provided, however, any
assignment by Buyer shall not relieve Buyer of any of its obligations and
liabilities under this Agreement or any other documents executed in connection
herewith, including but not limited to the Guarantees. Subject to the preceding
sentence, this Agreement will apply to, be binding in all respects upon and
inure to the benefit of the successors and permitted assigns of the Parties.
Nothing expressed or referred to in this Agreement will be construed to give any
person other than the parties to this Agreement any legal or equitable right,
remedy or claim under or with respect to this Agreement for the sole and
exclusive benefit of the parties to this Agreement and their successors and
assigns.

     13.9 SEVERABILITY. If any provision in this Agreement is held invalid or
unenforceable by any court of competent jurisdiction, the other provisions of
this Agreement will remain in full force and effect. Any provision of this
Agreement held invalid or unenforceable only in part or degree will remain in
full force and effect to the extent not held invalid or unenforceable.

     13.10 SECTION HEADINGS, CONSTRUCTION. The headings of Sections in this
Agreement are provided for convenience only and will not affect its construction
or interpretation. All words used in this Agreement will be construed to be of
such gender or number as the circumstances require. Unless otherwise expressly
provided, the word "including" does not limit the preceding words or terms.

     13.11 TIME OF ESSENCE. With regard to all dates and time periods set forth
or referred to in this Agreement, time is of the essence.

     13.12 GOVERNING LAW. This Agreement will be governed by the laws of the
State of Colorado without regard to conflicts of laws principles.

     13.13 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which will be deemed to be an original copy of this
Agreement and all of which, when taken together, will be deemed to constitute
one and the same agreement.

     13.14 CONSTRUCTION. The Parties have participated jointly in the
negotiation and drafting of this Agreement. In the event any ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the Parties and no presumption or burden of proof shall
arise favoring or disfavoring any Party by virtue of the authorship of any of
the provisions of this Agreement. Any references to any federal, state, local,
or foreign statute or law shall be deemed also to refer to all rules and
regulations promulgated thereunder, unless the context requires otherwise.

                                       20


     IN WITNESS WHEREOF, the parties have executed and delivered this Stock
Purchase Agreement as of the date first written above.


                                  SELLER:

                                  ISONICS CORPORATION

                                  By: /s/ Brantley J. Halstead
                                     -------------------------------------
                                  Brantley J. Halstead, Vice President - Finance


                                  BUYER:

                                  INTERPRO ZINC LLC

                                  By: /s/ Robert H. Cuttriss
                                     -------------------------------------
                                  Dr. Robert H. Cuttriss, President



                                       21


                                    EXHIBIT A



                                       22


                                  OTHER ASSETS

1.   Assignment Agreement between Isonics Corporation, Puremet Company, Cato
     Research Corporation and Professor Derek John Fray dated November 29, 2000.

2.   Agreements between Isonics Corporation and Professor Derek John Fray as set
     out in a Memorandum of Understanding dated September 2, 1999, and the First
     Amendment to the Memorandum of Understanding dated December 2, 1999, along
     with all rights contemplated in various correspondence and discussions
     between Isonics Corporation and Professor Derek John Fray.




                                       23