Abstract
The author developed a new method of quantitative analysis for potassium, which brought better results than those obtained by the conventional method using potassium permanganate as the oxidizing agent. The procedures are: Sodium cobaltinitrite is added to a solution containing 5 to 20mg. of potassium to precipitate sodium potassium cobaltinitrite. The precipitate is oxidized with potassium bichromate and then a known quantity of ferrous solution is added. The excess ferrous ion is backtitrated with a normal solution of potassium bichromate.
