Direct coulometric KFT

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AN-K-017 Water in expandable polystyrene  
Water in expandable polystyrene

The water content of expandable polystyrene is determined according to Karl Fischer. As this product expands when heated the oven method cannot be used. The sample is first dissolved in p-xylene in order to extract the water. Then methanol is added to precipitate the sample and the water is determined in the supernatant solution by coulometric titration.


English:  AN-k17.pdf (12 KB)

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Karl Fischer Titration > Direct coulometric KFT
   Water in expandable polystyrene