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          Determination of Trace Manganese by Square-Wave Stripping

          发布者:本网 | 浏览次数:

          Determination of Trace Manganese by Square-Wave Stripping
          Voltammetry
          Shujie Wang, Baoxian Ye*
          Department of Chemistry, Zhengzhou University, Zhengzhou 450052, P. R. China
          *e-mail: yebx@zzu.edu.cn
          Received: August 6, 2007
          Accepted: January 9, 2008
          Abstract
          A novel method of determining trace manganese by square-wave stripping voltammetry with simultaneous plating
          mercury electrode is described in this paper. Well-defined stripping peaks of manganese are obtained in H3BO4-
          NaOH buffer (pH 8.0) and peak currents are in good linear relationship with manganese concentrations in two ranges:
          from 0.36 nM to 36 nM and from 73 nM to 909 nM. The obtained detection limit is 0.18 nM and relative standard
          deviation is 2.3% (n?;;;7) under a predeposition time of 90 s. This proposed method has been used for the determination
          of trace manganese in real plasma samples with satisfiable results and good matching with the results of graphite
          furnace atomic absorption spectrometry.
          Keywords: Manganese, Square-wave stripping voltammetry, H3BO4-NaOH buffer, Plasma samples
          DOI: 10.1002/elan.200704136

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