期刊
TALANTA
卷 84, 期 2, 页码 451-456出版社
ELSEVIER
DOI: 10.1016/j.talanta.2011.01.047
关键词
Molecularly imprinted sol-gel; Electrochemical sensor; Gold nanoparticles; Sudan I
资金
- National Natural Science Foundation of China [20972056, 21075047]
- PCSIRT [IRT0953]
An electrochemical strategy on the basis of rationally designed molecularly imprinted sol-gel polymer embedded with gold nanoparticles (AuNPs) is developed for the specific and sensitive determination of Sudan I. The rationally designed sensing Sudan I imprinted sol-gel was prepared by mixing Sudan I with 3-aminopropyltriethoxysilane, tetraethoxysilane, chitosan, and AuNPs, followed by copolymerization and extraction of the template molecules. The hybrid forming membrane was characterized by SEM and FTIR-ATR, and used for the linear sweep voltammetric (LSV) determination of Sudan I in water/ethanol solutions. The LSV responses exhibited high sensitivity and selectivity, as discriminated from Sudan I analogues. Under optimal experimental conditions, LSV peak currents were linearly proportional to the concentrations of Sudan I in the range from 0.1 x 10(-7) to 1.0 x 10(-5) M, with a detection limit of 2.0 X 10(-9) M. The strategy is generally applicable in developing sensitive, selective, and moreover, reusable electrochemical sensors for quantitative determination of electroactive species. (C) 2011 Elsevier B.V. All rights reserved.
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