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Tuesday, 19 March 2019

Moisture in solvents

3 Posts

Wednesday 05 September 2001 1:00:00 am

Which one is the best procedure for determining moisture content in petroleum solvents and alcohols?

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Monday 10 September 2001 1:00:00 am

Karl Fischer test method is the universally accepted test method to determine free water or water of crystallization or moisture in solids or liquids. It is based on the chemical reaction of water with iodine and sulphur dioxide in pyridine:methanol solution. Titration system with specific reagents is the process used. Best wishes,

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Tuesday 11 September 2001 1:00:00 am

Hi, some little further remark:
(1) Yes, Karl Fischer Reagent Titration Method (ASTM D 1364) is indeed a good standard test method one can use to measure the water content of volatile solvents. (Also see ASTM D 4017.) EXCEPT THAT from our analytical/intrumental chemists's point of view, the K-F GLASSWARE intrument can easily get broken and damaged upon frequent use.
(2) alternatively, GAS CHROMATOGRAPHY is a good and accurate method too!! (See also ASTM D3792.)
Best Regards.

loba chemie

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Tuesday 22 January 2019 11:22:52 am

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