Direct potentiometric titration of chlorite in presence of chlorate, chlorine dioxide and chloride.
A direct potentiometric titration of chlorite in the presence of chlorate, chlorine dioxide and chloride is described. Chlorite is determined in 0.01-0.0005 M sodium chlorite at pH 2.0-3.5 using hypochlorite solution. The course of the reaction is followed potentiometrically using saturated calomel and platinum electrodes; the end-point is indicated by a potential jump of about 230 mV. Under these conditions no reaction takes place with chlorate, chlorine dioxide or chloride. Previously, the determination of chlorite in such mixtures was only possible by difference from several oxidimetric titrations.
Kepińtski
J
J
Department of Inorganic Chemical, Technology Technical University, Szczecin, Poland.
Błaszkiewicz
G
G