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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 10
BKCSDE 31(10)
October 20, 2010 

Simultaneous Determination of Cd2+, Pb2+, Cu2+ and Hg2+ at a Carbon Paste
Electrode Modified with Ionic Liquid-functionalized Ordered Mesoporous Silica
Penghui Zhang, Sheying Dong*, Guangzhe Gu, Tinglin Huang
Carbon paste electrode, Ionic liquid, SBA-15, Heavy metal ion
Ionic liquid-functionalized ordered mesoporous silica SBA-15 modified carbon paste electrode (CISPE) was fabricated and its electrochemical performance was investigated by cyclic voltammetry, electrochemical impedance spectra. The electrochemical behavior of Cd2+, Pb2+, Cu2+ and Hg2+ at CISPE was studied by differential pulse anodic stripping voltammetry (DPASV). Compared with carbon paste electrode, the stripping peak currents had a significant increase at CISPE. Under the optimized conditions, the detection limits were 8.0 × 10-8 M (Cd2+), 4.0 × 10-8 M (Pb2+), 6.0 × 10-8 M (Cu2+), 1.0 × 10-8 M (Hg2+), respectively. Furthermore, the present method was applied to the determination of Cd2+, Pb2+, Cu2+ and Hg2+ in water samples and people hair sample.
2949 - 2954
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