A simple voltammetric determination of metsulfuron-methyl in water samples using differential pulse cathodic stripping voltammetry

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  • Thanalechumi Paramalinggam
    Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia
  • Mohd Yusoff Abdull Rahim
    Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia
  • Yusop Zulkifli
    Faculty of Civil Engineering, Universiti Teknologi Malaysia

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  • 示差パルス陰極ストリッピングボルタンメトリー法による水試料中のメトスルフロンメチルの電気化学測定

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<p>The voltammetric determination of metsulfuron-methyl, a type of pesticide, was investigated on a hanging mercury drop electrode using a differential pulse cathodic stripping voltammetry technique. The experimental parameters, such as the pH of the Britton–Robinson buffer, accumulation time, accumulation potential and initial potential were optimized for the metsulfuron-methyl determination. A well-defined reduction peak was observed at pH 2.0 to 4.0 in the potential range of −0.75 to −1.0 V. The pH of 2.0 was chosen as the optimum pH due to a good stripping signal of the reduction peak. There were no significant interfering ion effects on the electroanalysis of metsulfuron-methyl. The optimized parameters were then used to determine metsulfuron-methyl in the commercial pesticide Ally. The proposed method was highly sensitive due to the lower limit of determination (0.04 mg/L), being relatively selective, and consisting of good precision. The recovery values achieved were about 93% in water samples for this analysis.</p>

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