The Titrisol^® reference buffer concentrate [boric acid/potassium chloride/sodium hydroxide; pH=9.00 ± 0.02 (20°C)] is analyzed in the ISO/IEC 17025 accredited calibration laboratory with a combined glass electrode and 5-point calibration according to DIN 19268 against a certified primary standard reference material following DIN 19266.

The Titrisol^® concentrated buffer material combines ease of use and maximum precision for the routine calibration and monitoring of pH instruments. To prepare the ready-to-use pH buffer solution, simply dilute the Titrisol^® buffer concentrate.

Download your certificate at https://www.sigmaaldrich.com/US/en/documents-search  to view certified values, including uncertainty and expiry date.

pH值（20 °C）：9.00+/-0.02
根据DIN 19266，使用标准缓冲液制备用参比物质进行多点校准（根据DIN 19268）后，用组合玻璃电极稀释至500 ml后测量。

Please visit Physical & Chemical Property Standards to explore a wide selection of standards and certified reference materials (CRMs) for many tests parameters.

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Titrisol is a registered trademark of Merck KGaA, Darmstadt, Germany