Amperometric determination of sodium hydrogen sulphite with chloramine-T.
Amperometric titrations with chloramine-T at a rotating platinum electrode (RPE) and a dropping mercury electrode (DME) have been applied to the determination of sodium hydrogen sulphite over the concentration range 0.004-0.1N. With the RPE, the indirect titration is best, at pH between 3 and 6, whereas the DME can be used for either direct or indirect titrations, at pH around 7. Relative standard deviations of 0.5% were obtained by both methods, with relative errors not exceeding +/- 1%.
Matsuda
T
T
Department of Chemistry, Ritsumeikan University, Kyoto, Japan.