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论文类型：期刊论文

发表时间：2012-10-01

发表刊物：MICROCHIMICA ACTA

收录刊物：Scopus、SCIE

卷号：179

期号：1-2

页面范围：163-170

ISSN号：0026-3672

关键字：Graphene; CdS; Photoelectrochemical immunosensor; Microcystin-LR

摘要：We report on a photoelectrochemical immunoassay for the determination of microcystin-LR (MC-LR). It is based on the unique photoelectrochemical properties of a CdS-graphene composite that was deposited on fluorine-doped tin oxide glass prior to immobilization of the antibody (Ab) against MC-LR. The electrode was used for the label-free determination of MC-LR by monitoring the decrease in the photocurrent that result from the immunoreaction. The electrode displays a linear response to MC-LR in the range from 0.1 to 25 mu g L-1, a detection limit of 0.021 mu g L-1 (at S/N = 3), and can be applied to determine MC-LR in environmental water samples.