Determination of small amounts of water with coulometrically generated Karl Fischer reagent

A coulometric method for the determination of small amounts of water described in a previous report has been further developed. Improved electronic circuitry and a redesigned electrolysis cell have extended the range of determination and decreased the time of analysis. By means of a movable oven specially adapted to the cell, water in solids has also been determined. The method presented is applicable with high accuracy in the range 0.005–5 mg of water in a large variety of substances.