Exhibit 31.1
CERTIFICATIONS
I, J. Bruce Lancaster, certify that:
1. | I have reviewed this Annual Report on Form 10-K-A of O.I. Corporation; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 29, 2009 | /s/ J. Bruce Lancaster |
J. Bruce Lancaster, | |
Chief Executive Officer and Chief Financial Officer | |
(Principal Executive and Financial Officer) |