期刊
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
卷 1027, 期 -, 页码 50-56出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jchromb.2016.05.022
关键词
Electrochemical polymerization; Polyluminol; Molecularly imprinted polymer; Stir bar sorptive extraction; Estrogens
资金
- National Natural Science Foundation of China [31070866]
- Natural Science Foundation of Zhejiang Province
- State Administration of Grain [201313010]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- KC Wong Magna Fund in Ningbo University
- [LY15B050002]
- [LY13C200017]
- [LY16B050004]
- [Pd2013088]
- [LY16B050003]
- [2016A610084]
Electrochemical polymerization of luminol molecularly imprinted polymer on carboxyl graphene (MIP/CG) was developed as stir bar sorptive extraction (SBSE) coating for selective pre-concentration and specific recognition of bisphenol A (BPA), hexoestrol and diethylstilbestrol in milk samples. Luminol was employed as monomer and BPA as the template to prepare MIP under 0-0.6 V electro-polymerization. Carboxyl graphene was modified on pencil lead as the substrate to increase extraction capacity. The preparation and extraction conditions affecting the extraction efficiency were optimized. Under the optimized conditions, a good linearity of three estrogens was obtained in the range of 4-1000 ng mL(-1). The average recoveries at the three spiked levels of the three estrogens ranged from 83.4% to 96.3% with the relative standard deviations (RSD) <= 7.1%. The limits of detection were in the range of 0.36-1.09 ng mL(-1). The developed method with low cost, high selectivity and good reproducibility can be potentially applied for determining trace estrogens in complex food samples. (C) 2016 Elsevier B.V. All rights reserved.
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