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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
Author(s) -
Yang Gongjun,
Yan Jiankang,
Qi Fen,
Sun Cheng
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000260
Subject(s) - anodic stripping voltammetry , bromocresol purple , stripping (fiber) , detection limit , bismuth , cadmium , analytical chemistry (journal) , materials science , supporting electrolyte , reproducibility , differential pulse voltammetry , buffer solution , electrode , bromocresol green , trace amounts , voltammetry , cyclic voltammetry , nuclear chemistry , chemistry , electrochemistry , chromatography , medicine , alternative medicine , composite material , pathology , metallurgy
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 Cd 2+ . 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 Cd 2+ concentrations in a range of 2.0×10 −8 –1.0×10 −7 M and 1.0×10 −7 –6.0×10 −6 M in 0.1 M NaAc‐HAc buffer solution (pH 5.0) with the detection limit of 6.5×10 −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 Cd 2+ in water samples.