HYDRANAL-Water Standards
Quality management plays an important role in Karl Fischer titration. Calibration, validation and inspection of analytical instruments and reagents is performed with a specific amount of water, either pure water or water standards. The challenge with pure water is the low amount required (10-50mg for volumetry, and 0.1-1mg for coulometry), which is difficult to handle and weigh.
We therefore recommend Hydranal-Water Standards with an exactly confirmed water content for
- Titer determination
- Monitoring precision and accuracy
- Validation and inspection of Karl Fischer titrators according to ISO, GMP, GLP and FDA guidelines
Traceability to a national standard or to a SI unit is often required in these guidelines. All Hydranal-Water Standards are tested against the NIST (National Institute of Standards and Technology, USA) standard reference material SRM2890, Water Saturated Octanol.
Liquid standards consist of a solvent mixture with specific composition and precisely determined water content. They are packaged in glass ampoules under argon. Each box contains ten single-use ampoules which are easy to open (pre-notched).
Solid standards contain defined amounts of chemically bound water suitable for both general use as well as for the Karl Fischer oven. These standards are packed in amber glass bottles.
HYDRANAL-CRM Water Standards
In 2014, Hydranal Technical Service in Seelze completed its combined accreditation according to ISO/IEC 17025 and ISO Guide 34, the so-called “Gold Standard Accreditation”, which is the highest achievable quality level for producers of Certified Reference Materials (CRMs). With the double accreditation, Hydranal introduced the very first commercially available CRM Water Standards for Karl Fischer titration.