期刊
FOOD CONTROL
卷 22, 期 5, 页码 786-791出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2010.11.017
关键词
Electrochemical sensor; Molecularly imprinted polymers; Sol-gel; Nanomaterials; Bisphenol a determination
资金
- National Natural Science Foundation of the People's Republic of China [30700535, 30972056, 30911140278]
- National High Technology Research and Development Program of China (National 863 Program of China) [2007AA10Z430]
- Foundation for Outstanding Young Scientist in Shandong Province [BS2009NY001]
- Scientific and Technological Development Plan in ShandongProvince [2010GNC10960]
Bisphenol A (BPA) was reported to show potential detrimental effects on wildlife and humans through altering endocrine function. In this study, a novel electrochemical imprinted sensor for sensitive and convenient determination of BPA was developed. Multi-walled carbon nanotubes (MWCNTs) and gold nanoparticles (GNPs) were introduced for the enhancement of electronic transmission and sensitivity. Thin film of molecularly imprinted sol-gel polymers with specific binding sites for BPA was cast on gold electrode by electrochemical deposition. The resulting composites were characterized by cyclic voltammetry (CV) and UV-visible spectra. Rebinding experiments were carried out to determine the specific binding capacity and selective recognition of the sensor. The linear range was from 1.13 x 10(-7) to 8.21 x 10(-3) mol L-1, with the limit of detection (LOD) of 3.6 x 10(-9) mol L-1 (S/N = 3). The imprinted sensor was successfully tested to detect BPA in real samples. (C) 2010 Elsevier Ltd. All rights reserved.
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