Water Determination in Insulating Oil by Karl Fischer Titration

ESSO UNIVOLT 50 and 56, paraffinic uninhibited transformer oils were analysed. A coulometric determination was conducted because of the low water content. Since purely alcoholic reagents are not suitable for extracting water with multiple injections, we used reagents that contain solubilizers. While very few oil samples clearly dissolved, they did disperse. Using reagents that contain chloroform and/or xylene requires the use of a coulometric cell with diaphragm. We also followed the indirect method with a KF oven for vials.

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Coulometric reagents: Water Standards: Auxiliaries:
34868 HYDRANAL-Coulomat Oil
34807 HYDRANAL-Coulomat A
34739 HYDRANAL-Coulomat AG-Oven34840 HYDRANAL-Coulomat CG
34828 HYDRANAL-Water Standard 1.034426 HYDRANAL-CRM Water Standard 1.034446 HYDRANAL-Water Standard 0.1 PC34693 HYDRANAL-Water Standard KF Oven 140-160°C 34241 HYDRANAL-Molecular Sieve 0.3 nm34788 HYDRANAL-Humidity Absorber

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