Buffer concentrate

Analysis Note
pH-value (20 °C): 4.00 +/- 0.02
Measured after dilution to 500 ml with a combination glass electrode after multiple point calibration (according to DIN 19268) with reference materials for the preparation of standard buffer solutions according to DIN 19266.
Application
Buffer concentrate can be used as a standard buffer for calibrating pH meters to ensure accurate pH measurements.
Features and Benefits
Traceable to primary standard reference materials from NIST and PTB
Analytical standard Grade
Uncertainty data and traceability are documented in a comprehensive and batch-specific Certificate of Analysis.

General description
The Titrisol® reference buffer concentrate [citrate/hydrochloric acid; pH=4.00±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.
Other Notes
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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Legal Information
Titrisol is a registered trademark of Merck KGaA, Darmstadt, Germany