Estimation of individual thio-salts and sulphate in flotation mill solutions.

This paper presents methods found to be suitable for the determination of thio-salts and sulphate in flotation mill solutions. Thiosulphate, tetrathionate and trithionate are estimated spectrophotometrically after cyanolysis. A modified iodimetric procedure is used for sulphite and a titrimetric method for direct determination of sulphate. The observation that dithionate is not oxidized by hydrogen peroxide but is oxidized to sulphate by potassium chlorate-nitric acid mixture is the basis for estimation of dithionate.