Produkte kimike të lëngshme për përdorim industrial - Metoda e përgjithshme për përcaktimin e gjurmëve të komponimeve të squfurit, si sulfat me anë të reduktimit dhe me anë të metodës titrimetrike
Chemical products for industrial use — General method for determination of traces of sulphur compounds, as sulphate, by reduction and titrimetry
Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by titration of the sulphide ions with standard volumetric mercury(II) acetate or nitrate solution in the presence of 1,5-diphenyl-3-thiocarbazone (dithiozone) as indicator.
English