Water Standards for Quality Control in Karl Fischer Titration

Calibration and validation of analytical instruments and reagents are central requirements in regular Quality Management systems. In the case of Karl Fischer (KF) titration, regular titer determination and control of precision and accuracy are of fundamental importance. A standard with a known amount of water is required for quality control.

Liquid HYDRANAL^® Water Standards are ideal for water determination testing in volumetric and coulometric KF titration. They consist of stable solvent mixtures with specific composition and precisely determined water content, supplied in airtight glass ampules to ensure quality. The exact amount of water is provided on the Certificate of Analysis, which is enclosed in each product package. These Water Standards are tested against the NIST Standard Reference Material, SRM 2890, Water Saturated 1-Octanol.

Advantages of Liquid HYDRANAL Water Standards:

• Filled under Argon in glass ampules
• Minimum shelf-life of five years
• One ampule is sufficient for one test series
• Supplied with a Certificate of Analysis
• Tested against NIST SRM 2890.

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_{Trademark: HYDRANAL is a registered trademark of Sigma-Aldrich Laborchemikalien GmbH.}