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Certificate of Analysis

[YSI logo] YSI Incorporated

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

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

a xylem brand

Product Details

Product Category: Buffer and solid products

Product Model Number: 2357

Lot Number: 250703GFS098005

Method: Verification of mass and pH (for buffers)

Test Results

Determination	Specification	Result
Average mass	6.00 - 6.70 g	6.35 g
Average pH (buffers only)	7.1 - 7.5	7.3

Verification Statement

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: Amanda Fenner

Date: 7/29/2025

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