• 文献标题:   Simultaneous Electrocatalytic Determination of Lead and Cadmium Ions Employing a Poly(Methylene Blue)/Graphene Modified Glassy Carbon Electrode
  • 文献类型:   Article
  • 作  者:   CHAO MY, MA XY
  • 作者关键词:   lead ion, cadmium ion, poly methylene blue, graphene, modified electrode, cyclic voltammetry
  • 出版物名称:   RUSSIAN JOURNAL OF ELECTROCHEMISTRY
  • ISSN:   1023-1935 EI 1608-3342
  • 通讯作者地址:   Heze Univ
  • 被引频次:   1
  • DOI:   10.1134/S1023193515010036
  • 出版年:   2015

▎ 摘  要

Employing a poly(methylene blue)/graphene modified glassy carbon electrode (PMB/Gr/GCE) electrode, a sensitive and convenient method for the simultaneous determination of lead and cadmium ions (Pb2+ and Cd2+) was developed by cyclic voltammetry. The electrochemical behavior of these two species at the PMB/Gr/GCE was investigated by cyclic voltammetry. Experimental results showed that the oxidation peak currents corresponding to the two species were significantly increased at the modified electrode and this was further used to determine them. Under optimized analytical conditions, the oxidation peak currents corresponding to both species showed linear dependence on their concentration in the range from 4.00 x 10(-8) to 1.60 x 10(-5) mol L-1. The detection limits for Pb2+ and Cd2+ were 1.00 x 10(-8) mol L-1 and 1.20 x 10(-8) mol L-1, respectively. The developed method showed several advantages over reported voltammetric methods, such as high sensitivity, wide linear range, low detection limits and good recoveries. The applicability of the developed method has been demonstrated utilizing real sea shrimp and river water samples.