期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 121, 期 1, 页码 67-73出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2006.09.042
关键词
molecularly imprinted polymers; zearalenone; fluorescent probes; fluorosensor; pyrene
A molecularly imprinted polymer (MIP)-based optode has been developed for zearalenone (ZON) mycotoxin analysis. The automated flow-through assay is based on the displacement of tailor-made highly fluorescent tracers by the analyte from a MIP prepared by UV irradiation of a mixture of cyclododecyl 2,4-dihydroxybenzoate (template, ZON mimic), I-allyl piperazine (functional monomer), trimethylolpropane trimethacrylate (crosslinker) and 2,2'-azobisisobutyronitrile in acetonitrile (porogen). Three fluorescent analogues of ZON, namely 2,4-dihydroxybenzoic acid 2-[methyl(7-nitro-benzo[1,2,5]oxadiazol-4-yl)amino]ethyl ester (NBDRA), 2,4-dihydroxy-N-pyren-1-ylmethylbenzamide (PMRA) and of 2,4-dihydroxybenzoic acid 2-[(pyrene-1-carbonyl)amino] ethyl ester (PARA), have been molecularly engineered for the assay development. The pyrene-containing tracers also inform on the characteristics of the microenvironment of the MIP binding sites. PARA has been finally selected to optimize the ZON displacement fluorosensor, that shows a limit of detection of 2.5 x 10(-5) M in acetonitrile. A positive cross-reactivity has been found for beta-zearalenol, but not for resorcinol, resorcylic acid, 17 beta-estradiol, estrone or bisphenol-A. (c) 2006 Elsevier B.V. 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