Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (3): 447.doi: 10.7503/cjcu20170339

• Analytical Chemistry • Previous Articles     Next Articles

Electroanalytical Sensing of Trace Cd(Ⅱ) Using in-situ Bismuth Modified Boron Doped Diamond Electrode

GAO Chengyao1,2,3, TONG Jianhua1, BIAN Chao1, SUN Jizhou1, LI Yang1, WANG Jinfen4, GONG Shun1, HUI Yun1, XIA Shanhong1,*()   

  1. 1. State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
    2. University of Chinese Academy of Sciences, Beijing 100190, China
    3. Chinese People’s Armed Police Force Academy, Langfang 065000, China
    4. Chinese National Center for Nanoscience and Technology, Beijing 100190, China
  • Received:2017-05-31 Online:2018-03-10 Published:2018-01-23
  • Contact: XIA Shanhong E-mail:shxia@mail.ie.ac.cn
  • Supported by:
    † Supported by the National Basic Reasearch Program of China(No.2015CB352100), the National Natural Science Foundation of China(No.61306010) and the Natural Science Foundation of Hebei Province, China(No.E2014507012)

Abstract:

Electroanalytical determination of Cd(Ⅱ) by square wave anodic stripping voltammetry(SWASV) using abismuth in-situ modified boron doped diamond(BDD) electrode was studied. In presence of Bi(Ⅲ), the sensitivity for the determination of Cd(Ⅱ) was remarkably enhanced. Various experimental parameters such as the concentrations of Bi(Ⅲ), boron doped concentrations of BDD electrode, pH value, deposition potential, pulse frequency, pulse size and deposition time were optimized. Under the optimal conditions, the stripping peak currents of Cd(Ⅱ) increased linearly with increasing concentrations of Cd(Ⅱ) in the ranges of 1—10 μg/L(R2=0.9979) . The limit of detection was estimated to be 0.15 μg/L. The sensor was successfully applied to the determination of trace Cd(Ⅱ) in the real water samples with recoveries in the range from 96% to 107%. This developed electrochemical sensor exhibited high sensitivity, good stability and reproducibility.

Key words: Boron doped diamond thin film electrode, Anodic stripping voltammetry, Cd(Ⅱ) detection, Electrochemistry, in-situ Bismuth modified electrode

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