Sodium Cobaltinitrite LR is a water-soluble compound which is most commonly utilized for determination of potassium, ammonium, & thallium ions. It is known to have molecular formula CoN6Na3O12 with a molar mass of 403.933 g/mol.
A new qualitative test for potassium was described by Kamm and Burgess1:- By the addition of sodium cobaltinitrite to a potassium solution containing silver ions an extremely insoluble orange-yellow precipitate of potassium silver cobalti- nitrite is produced.
Dissolve 1.583 g of potassium chloride in water, and dilute with water to 500 mL. To 10.0 mL of this solution (20 mg of K2O) in a 50 mL beaker, add 2 mL of 1 N nitric acid and 8 mL of water. Dissolve 5 g of the sodium cobaltinitrite in water, dilute with water to 25 mL, and filter.
In geochemical analysis, sodium cobaltinitrite is used to distinguish alkali feldspars from plagioclase feldspars in thin section.
SODIUM COBALTINITRITE LR
