Determination of Microamounts of Moisture in Lithium Hexafluorophosphate by Coulometric Titration

Trace amounts of moisture in lithium hexafluorophosphate was determined by coulometric titration based on the reaction with Karl-Fisher reagent. Results of determination in a same sample with 10 different amounts of the sample solution introduced in the range from 0.5 to 5.0 mL,found by this method were in the range of 26.3 μg·g-1 to 27.9 μg·g-1 (av. 27.4 μg·g-1) with value of standard deviation 0.72%.