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YSI Incorporated

Yellow Springs Instrument Co., Yellow Springs, Ohio 45387 USA

Phone: 937 767-7241 | Toll-Free: 800 765-4974 | Fax: 937 767-9353

Certificate of Analysis

Product Information

Product Category: Bioanalytical Standard

Product Model Number: 1531

Lot Number: 25H100236

Method: Comparative enzymatic testing of Production standard vs Metrology standard

Test Results

Chemistry Tested	Determination	Tolerance	Result
GLUCOSE	(Average of Production)-(Average of Metrology) Coefficient of variation for production standard (CV,%)	±50 mg/L ≤2.0%	4.4 mg/L 0.8 %

The procedures used to manufacture and test this product have been verified by QA for compliance. The electronic signature below is representative of the Chemistry Technician testing and verifying conformity to acceptance criteria.

Completed by: Nick Rittenhouse

Date: 8/14/2025

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