Determination of Iron Monosulfide and Iron Disulfide in Suspensions by an Electrochemical Method Using a Platinum-Silver Twin-Electrode

作者：Diao Xiaojun; Sumi Katsuhiro^*

来源：Analytical Sciences, 2010, 26(6): 681-686.

New electrochemical technique with a Pt-Ag twin electrode is proposed for the determining the contents of iron sulfides (FeS and FeS2) in a suspension. After electrolytic oxidation with a Pt electrode, Fe2+ was measured by linear sweep voltammetry. From relations of the charge amount from the baseline to the peak in the voltammogram of Fe2+ with the content of FeS or FeS2, linear calibration curves (a) and (b) were prepared, respectively. After measurements of Fe2+, Fe2+ and S-0 were reduced with a Pt electrode to remove Fe2+ and to produce S2-. With an Ag electrode, Ag2S was deposited on Ag. A linear curve (c) was prepared from a relation between the charge amount of the Ag2S peak part and the FeS content. However, in the suspension of FeS2, Ag2S can not be detected.

• 出版日期2010-6