Measurement of trace lead (II) in water samples with biomacromolecule heparin modified electrode |
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Authors: | Li Huiling Liu Shouqing Jiang Mian Li Peibiao |
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Institution: | (1) Department of Chemistry, Wuhan University, 430072 Wuhan, China;(2) Present address: Dept of Chem, Ouan Univ of qingdao, 266003 Qingdao |
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Abstract: | A new method for electrode modification and accumulation with a biomacromolecule and subsequent voltammetric quantittion of
metal ions is described. Heparin is used as the surface modifier, and the method is based on formation of the heparin complex
of lead (II). The voltammetric responses were evaluated with respect to electrolyte, pH, preconcentration time, and lead concentration.
The electrode composition, voltammetric wave form and other variables have also been taken into account. A detection limit
of 3.0×10−9 mol/L has been obtained by preconcentration for 20 min. The method is sensitive, simple and relatively rapid, with a relative
standard deviation of 5.2% at the 1.0×10−7 mol/L level.
Supported by the Trants-Century Training Program Foundation for the Talents from the State Commission of Education of China:
the national Natural Science Foundation of China and the Opening Laboratory Foundation of Changchun Institute of Applied Chemistry,
Chinese Academy of Sciences.
Li Huiling: Born in July 14, 1972. Master of Science. |
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Keywords: | lead(II) trace analysis heparin modified electrode |
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