High Sensitivity and Reproducibility of a Bismuth/Poly(bromocresol purple) Film Modified Glassy Carbon Electrode for Determination of Trace Amount of Cadmium by Differential Pulse Anodic Stripping Voltammetry

被引:23
|
作者
Yang, Gongjun [1 ,2 ]
Yan, Jiankang [2 ]
Qi, Fen [2 ]
Sun, Cheng [3 ]
机构
[1] China Pharmaceut Univ, Sch Pharm, Nanjing 210009, Peoples R China
[2] Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou 225002, Peoples R China
[3] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Peoples R China
关键词
Bismuth/poly(bromocresol purple) film modified electrode; Cadmium; Differential pulse anodic stripping voltammetry; WATER SAMPLES; HEAVY-METALS; IONS; CD(II); PB(II); LEAD; PRECONCENTRATION; VOLTARNMETRY; NETWORK; SYSTEM;
D O I
10.1002/elan.201000260
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This work described a novel type of bismuth/poly(bromocresol purple) film modified glassy carbon electrode (denoted as Bi/Poly(BCP)/GCE) for anodic stripping analysis of trace Cd2+. The Bi/Poly(BCP)/GCE was fabricated in situ by depositing simultaneously bismuth and cadmium by reduction at -1.20 V on the poly(BCP) film using a differential pulse voltammetry. Under the optimum conditions, the anodic stripping peak current response increased linearly with the Cd2+ concentrations in a range of 2.0 x 10(-8)-1.0 x1.0(-7) M and 1.0 x 10(-7)-6.0x10(-6) M in 0.1 M NaAc-Ac buffer solution (pH 5.0) with the detection limit of 6.5 x 10(-9) M (S/N =3). The Bi/poly(BCP)/GCE performed good reproducibility and high sensitivity. Finally, this proposed method was successfully applied to determine the concentration of Cd2+ in water samples.
引用
收藏
页码:2729 / 2738
页数:10
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