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- W2012308933 abstract "Three voltammetric reduction peaks at a dropping mercury electrode are observed in acid media when scanned during the life of one mercury drop. These diminish in magnitude as the pH is increased and a fourth wave appears at more negative potentials. The first peak is attributed to the four-electron reduction of H2SeO3 to HgSe, with H2Se formed as an intermediate product which depolarizes the mercury electrode. The fourth wave is attributed to the six-electron reduction of Se(IV) to minus-2 selenium. The second and third peaks are difficult to evaluate, but are probably due to the elimination of the electrode depolarization by H2Se and to reduction of HgSe formed during the first peak. Multiple peaks are observed at high concentrations, possibly due to stepwise reduction of successive monolayers of HgSe. Addition of Hg(II) or Cu(II) to the solution decreases and/or shifts the second and third peaks. A single anodic peak is observed on cyclic scanning, in the vicinity of the second and third cathodic peaks. The first cathodic wave is recommended for quantitative analysis at pH 2.5, with a sensitivity of 10−7 M Se(IV)." @default.
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- W2012308933 date "1980-05-01" @default.
- W2012308933 modified "2023-09-26" @default.
- W2012308933 title "Study of selenium(IV) at a dropping mercury electrode by cyclic voltammetry with triangle polarization" @default.
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- W2012308933 doi "https://doi.org/10.1016/s0022-0728(80)80117-3" @default.
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