期刊
ELECTROCHIMICA ACTA
卷 206, 期 -, 页码 86-98出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.117
关键词
Glutathione (GSH); Biothiols; Electrochemical detection; Catechol derivatives; Single-walled carbon nanotubes (SWNTs)
资金
- National Science Foundation of China [21305109, 81202492, 91332101]
- PhD Startup Foundation of Xi'an Medical University of China [2012DOC09]
- Scientific Research Plan Projects Foundation of Shaanxi Science and Technology Department of China [2014JQ2073]
A highly selective method for the electrochemical detection of reduced glutathione (GSH) has been developed on the basis of the product of a reaction between GSH and catechol as the electron mediator on single-walled carbon nanotubes modified glassy carbon electrode. A polymerization-adduct ECE mechanism at SWNTs/GCE was proposed. The oxidation peak potential was -0.160 V (vs. Ag/AgCl, sat. KCl) and the oxidation peak current showed a dependence relationship with GSH concentration in the range of 1.0 similar to 500.0 mu M with a detection limit of 0.5 mu M GSH. The developed method can discriminate GSH from other thiol species such as L-cysteine (Cys) and cysteamine hydrochloride (Cym) within their certain concentration ranges. The as-established electrochemical method has been successfully applied for the determination of GSH from the leakage of intracellular GSH contents in HeLa cells following doxorubicin-induced cell apoptosis. (C) 2016 Elsevier Ltd. All rights reserved.
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