WATER DETERMINATION
Since water has a direct influence on the chemical and physical stability of products, interfering with their storage conditions, to determine the water content in a sample is essential.
NanoBusiness conducts Water Content tests using the main methods:
KARL FISCHER TITRATION
It is based on the reactions that occur between the Karl Fischer reagent (iodine, sulfur dioxide and amine) and small amounts of water, and is considered the most frequently used titration process.
Two techniques are possible:
- Volumetric titration (indicated for samples in which water is the main component);
- Coulometry (perfect for cases with a very small amount of water).
LOSS ON DRYING
It is a test that defines the water content of a given sample under specific conditions of temperature and time. The methodology may vary according to the substance, and the most common are Thermogravimetric analysis and Drying on silica or greenhouse.