Micro-colorimetric Determination of Potassium with Dipicrylamine
Determination of potassium in biological solutions such as, blood, urine, milk, plant saps, and soil solutions has become a pressing problem in recent years due to the most important role played by potassium in biochemical processes. Many workers have tackled this problem from different angles. Various methods have been adopted but these were either gravimetric or volumetric ones and involve many tedious and complicated processes. A few years ago Kolthoff and Bendix 1 described the use of dipicrylamine in the gravimetric, volumetric, and colorimetric determination of potassium. Recently E. Amdur adopted the colorimetric procedure to the determination of potassium in tissues and blood.
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