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Modified Capillary Electrophoresis for Highly Sensitive and Selective Detection of Hg2+ in Natural Water
Author(s) -
Wang Junwei,
Wang Yufang,
Dong Yanjie,
Lu Lu,
Li Qianqian,
Wang Zhongling,
Zhang Yuanguang
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500521
Subject(s) - chemistry , capillary electrophoresis , selectivity , mercury (programming language) , capillary action , aqueous solution , analytical chemistry (journal) , metal ions in aqueous solution , chromatography , fluorescence , ion , tap water , biochemistry , materials science , physics , organic chemistry , quantum mechanics , computer science , composite material , programming language , catalysis , environmental engineering , engineering
A novel capillary with high sensitivity and selectivity for mercury ion detection based on modified nanosize silica has been designed and synthesized. The obtained modified capillary was applied to separate and determine mercury ion by capillary electrophoresis with a laser‐induced fluorescence detector. The optimal experimental conditions were determined by evaluating various controlling factors: running buffer hexamine‐HCl 15 mmol L −1 , pH=5.2, separation voltage 30 kV and temperature 25 °C. The modified capillary exhibited excellent sensitivity and selectivity for Hg2+ over other coexisting metal ions (K + , Ag + , Ca2 + , Mg 2+ , Ba 2+ , Ni 2+ , Cd 2+ , Pb 2+ and Zn 2+ increased to 10000 times of Hg 2+ , Cu 2+ increased to 5000 times) in aqueous solution, and was successfully applied to the determination of Hg 2+ in natural water samples and displayed satisfactory results.