title: Microfabricated interdigitated Au electrode for voltammetric determination of lead and cadmium in Chinese mitten crab (Eriocheir sinensis).
abstract: An in-situ plating bismuth modified interdigitated Au electrode (IAE) was developed for determination of Pb(2+) and Cd(2+) in crab. The IAE was fabricated and used as counter electrode and working electrode. Cyclic voltammetry (CV) was performed with the IAE for studying electrochemical performance, showing clear redox peaks. The key operational parameters were optimized, which were 600 μg L(-1) of Bi(3+) concentration, 0.1 mol L(-1) of acetate buffer (pH 4.5), -1.2V of deposition potential and 180 s of deposition time. Under optimized condition, the linear range of IAE was from 5 to 50 μg L(-1) for both metal ions, with detection limit (threefold signal-to-noise) of 0.74 μg L(-1) for Pb(2+) and 0.86 μg L(-1) for Cd(2+). Finally, the developed sensor was applied to detect Pb(2+) and Cd(2+) in crab extract solutions by standard addition method. The results were in good agreement with outcomes obtained by inductively coupled plasma mass spectrometry.
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Yiwei
authors: Y
authors: Xu
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Wen
authors: W
authors: Zhang
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Jiyong
authors: J
authors: Shi
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address: zou_xiaobo@ujs.edu.cn.
authors: Xiaobo
authors: X
authors: Zou
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Zhihua
authors: Z
authors: Li
authors: College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors: Yaodi
authors: Y
authors: Zhu
mesh_terms: D000818:Animals; D001729:Bismuth; D003386:Brachyura / Q000737:chemistry*; D002104:Cadmium / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D007854:Lead / Q000032:analysis*
chemical_list: D002104:Cadmium; D007854:Lead; D001729:Bismuth
keywords: Heavy metal ions; Interdigitated Au electrode; Stripping voltammetric detection