Anodic Stripping Voltammetry for the Determination of Trace Cr(VI) with Graphite/Styrene-Acrylonitrile Copolymer Composite Electrodes

• SARI Trisna K.

  Department of Chemistry, Faculty of Science, Shinshu University

• JIN Jiye

  Department of Chemistry, Faculty of Science, Shinshu University

• ZEIN Rahmiana

  Department of Chemistry, Faculty of Mathematics and Natural Science, Andalas University

• MUNAF Edison

  Department of Chemistry, Faculty of Mathematics and Natural Science, Andalas University

抄録

A square-wave anodic stripping voltammetry (SWASV) for the determination of trace amounts of hexavalent chromium Cr(VI) at a graphite/styrene-acrylonitrile (Graphite-SAN) copolymer composite electrode is described. This method involves a preconcentration step whereby the trace Cr(VI) was cathodically reduced to Cr(III) on an electrode surface in an acetate buffer (pH 5), followed by an anodic stripping technique with a square-wave voltammetric mode. It has been shown that the analytical sensitivity is significantly improved at the Graphite-SAN copolymer composite electrode in comparison with the conventional glassy carbon electrode, due to the strong interaction between Cr(III) and the nitrile end group of the SAN copolymer. The SWASV response was characterized with respect to the pH, deposition potential, possible interferences, etc. Under the optimal conditions, the stripping peak height linearly increased with the concentration of Cr(VI) in a range from 0 to 150 ng mL⁻¹ with a correlation coefficient of 0.997, and a detection limit of 4.2 ng mL⁻¹ was achieved based on signal-to-noise ratio of about 3. The Graphite-SAN composite electrode exhibited some interesting advantages, such as high mechanical rigid, easy surface renewable, higher sensitivity and better peak resolution in comparison with the results at conventional glassy carbon electrodes. They have been applied to the determination of Cr(VI) in real water samples with satisfactory recoveries.

収録刊行物

• Analytical Sciences

  Analytical Sciences 33 (7), 801-806, 2017

  社団法人 日本分析化学会

キーワード

• Graphite/styrene-acrylonitrile copolymer composite electrode
• hexavalent chromium Cr(VI)
• anodic stripping voltammetry

詳細情報

• CRID: 1390282679238222336
• NII論文ID: 130005796344
• NII書誌ID: AA10500785
• DOI: 10.2116/analsci.33.801
• ISSN: 13482246
• ISSN: 09106340
• NDL書誌ID: 028339972
• PubMed: 28690257
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028339972
• Web Site: https://link.springer.com/content/pdf/10.2116/analsci.33.801.pdf
• Web Site: https://link.springer.com/article/10.2116/analsci.33.801/fulltext.html
• Web Site: https://www.jstage.jst.go.jp/article/analsci/33/7/33_801/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可