Citation: GAO Cheng-Yao, TONG Jian-Hua, BIAN Chao, SUN Ji-Zhou, LI Yang, WANG Jin-Fen, GONG Shun, HUI Yun, XU Yu-Hao, WANG Xiao-Qing, XIE Hu-Cheng, XIA Shan-Hong. Determination of Trace Zn, Cd and Pb Metal Ions Using In-situ Bismuth-modified Boron Doped Diamond Electrode[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(2): 217-224. doi: 10.11895/j.issn.0253-3820.171026 shu

Determination of Trace Zn, Cd and Pb Metal Ions Using In-situ Bismuth-modified Boron Doped Diamond Electrode

1.
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2.
Chinese People's Armed Police Force Academy, Langfang 065000, China;
3.
Chinese National Center for Nanoscience and Technology, Beijing 100190, China

Received Date: 21 June 2017
Revised Date: 6 November 2017

Fund Project: This work was supported by the Key Project of Major State Basic Research Development Program (No. 2015CB352100), the National Natural Science Foundation of China (No. 61306010) and the Natural Science Foundation of Hebei Province, China (No. E2014507012).

Bismuth modified boron doped diamond (BDD) film electrode was employed for simultaneous determination of trace Zn(II), Cd(II) and Pb(II) by anodic stripping voltammetry. Bi(III) was simultaneously in-situ deposited on bismuth modified boron doped diamond electrode with Zn(II), Cd(II) and Pb(II) by pre-concentration. In the presence of Bi(III), the sensitivity for determination of Zn(II), Cd(II) and Pb(II) was remarkably enhanced. Influence factors such as bismuth concentration, boron doped concentrations of BDD electrode, pH, preconcentration potential were investigated and optimized. Under the optimal conditions, the stripping peak currents increased linearly with the increasing concentration of Zn(II), Cd(II) and Pb(II) in the range of 10-300 μg/L. The limit of detection was 0.56 μg/L for Zn(II), 0.32 μg/L for Cd(II) and 0.75 μg/L for Pb(II) (S/N=3), respectively. The interference experiments showed that common ions had little influence on the determination except Cu(II). In addition, the developed electrode displayed a good repeatability. The method was successfully applied to determination of Zn(II), Cd(II) and Pb(II) in real water samples with the standard addition recoveries of 92.0%-114.0%.
- Boron doped diamond thin film electrode,
- Anodic stripping voltammetry,
- Heavy metal ions,
- Simultaneous detection,
- Electrochemical sensor
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沈阳化工大学材料科学与工程学院沈阳 110142