Rational design and application of molecularly imprinted sol-gel polymer for the electrochemically selective and sensitive determination of Sudan I

被引:35
作者
Chen, Shizhen [1 ]
Du, Dan [1 ]
Huang, Jing [1 ]
Zhang, Aiqing [2 ,3 ]
Tu, Haiyang [1 ]
Zhang, Aidong [1 ]
机构
[1] Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China
[2] S Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China
[3] S Cent Univ Nationalities, Minist Educ, Key Lab Catalysis & Mat Sci State Ethn Affairs Co, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
Molecularly imprinted sol-gel; Electrochemical sensor; Gold nanoparticles; Sudan I; SURFACE; SILICA; TNT; NANOPARTICLES; NANOTUBES; CATALYSIS; STRATEGY; FOOD;
D O I
10.1016/j.talanta.2011.01.047
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
引用
收藏
页码:451 / 456
页数:6
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