title: [Not Available].
abstract: Constant-current coulometric titration is applied to the determination of manganese and chromium contained in organic compounds. These compounds are decomposed in a mixture of sulphuric and nitric acids. The Mn and Cr are oxidized by ammonium persulphate to MnO(4)(-) and by perchloric acid to Cr(2)O(7)(2-) respectively. MnO(4)(-) and Cr(2)O(7)(2-) are titrated by Fe(2+) electrolytically generated from Fe(3+) by constant-current eletrolysis, with amperometric endpoint detection.
authors.affiliation: Service Central de Microanalyse du Centre National de la Recherche Scientifique, 2, rue Henry Dunant, 94-Thiais, France.
authors.forename: M
authors.initials: M
authors.lastname: Bigois