期刊
FOOD RESEARCH INTERNATIONAL
卷 44, 期 1, 页码 276-281出版社
ELSEVIER
DOI: 10.1016/j.foodres.2010.10.020
关键词
Electrochemical sensor; Molecularly imprinted polymer; Multiwalled carbon nanotube-gold nanoparticle composites; Chitosan; Tyramine detection
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 Shandong Province [2010GNC10960]
A novel sensitive molecularly imprinted electrochemical sensor has been developed for selective detection of tyramine by combination of multiwalled carbon nanotube-gold nanoparticle (MWCNT-AuNP) composites and chitosan. MWCNT-AuNP composites were introduced for the enhancement of electronic transmission and sensitivity. Chitosan acts as a bridge for the imprinted layer and the MWCNT-AuNP composites. The molecularly imprinted polymer (MIP) was synthesized using tyramine as the template molecule, silicic acid tetracthyl ester and triethoxyphenylsilane as the functional monomers. The molecularly imprinted film displayed excellent selectivity towards tyramine. Under the optimum conditions, the current response had a linear relationship with the concentration of tyramine in the range of 1.08 x 10(-7) to 1 x 10(-5) mol/L, with a limit of detection 5.7 x 10(-8) mol/L. The proposed sensor exhibited excellent repeatability, which was better than the result from previous literature. The relative standard deviation (RSD) of the repeated experiments for tyramine (5 mmol/L) was 7.0%. Determination of tyramine in real samples showed good recovery. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据