Electroanalytical Sensing of Trace Cd(Ⅱ) Using in-situ Bismuth Modified Boron Doped Diamond Electrode [痕量镉离子在原位铋修饰掺硼金刚石电极上的传感分析]

作者：Gao C.; Tong J.; Bian C.; Sun J.; Li Y.; Wang J.; Gong S.; Hui Y.; Xia S.^*

来源：Chemical Journal of Chinese Universities, 2018, 39(3): 447-454.

DOI：10.7503/cjcu20170339

• Anodic stripping voltammetry
• Boron doped diamond thin film electrode
• Cd(Ⅱ) detection
• Electrochemistry
• In-situ Bismuth modified electrode

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.

• 单位
  传感技术国家重点实验室; 中国科学院大学