Solid-phase extraction of aflatoxins using a nanosorbent consisting of a magnetized nanoporous carbon core coated with a molecularly imprinted polymer

被引：37
作者：
Wu, Chaojun [1 ]
He, Juan [1 ]
Li, Yuanyuan [1 ]
Chen, Ningning [1 ]
Huang, Zhipeng [1 ]
You, Liqin [1 ]
He, Lijun [1 ]
Zhang, Shusheng [2 ]
机构：
[1] Henan Univ Technol, Sch Chem Engn & Environm, Zhengzhou 450001, Henan, Peoples R China
[2] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Henan, Peoples R China
来源：
MICROCHIMICA ACTA | 2018年 / 185卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Pseudo-template; Atom transfer radical precipitation polymerization; Surface imprinting; Core-shell; Metal-organic frameworks; Zeolitic imidazolate framework-L; Carbonization; Pretreatment; Magnetic sold phase extraction; Corn sample; TRANSFER RADICAL POLYMERIZATION; METAL-ORGANIC FRAMEWORK; LIQUID-CHROMATOGRAPHY; ZIF-L; MASS-SPECTROMETRY; ACID; NANOPARTICLES; ADSORBENT; MICROSPHERES; TETRACYCLINE;
D O I：
10.1007/s00604-018-3051-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A core consisting of nanoporous carbon (MNPC) and magnetized with Co3O4 was coated with a molecularly imprinted polymer (MIP) by atom transfer radical precipitation polymerization. Ethyl 3-coumarincarboxylate was used as a pseudo-template to give a MIP that has a fairly specific recognition capability for aflatoxins. Batch rebinding studies were carried out to determine the specific adsorption equilibrium and specific recognition. Extraction is achieved in a single step by mixing and vortexing the sample extract with the Co-MNPC@ MIP. The loaded nanosorbent was then magnetically separated and eluted with acetonitrile/ water (6/ 4, v/ v). The aflatoxins were then quantified by HPLC. Under optimal conditions, the detection limits for aflatoxins typically are 0.05-0.07 ng mL-1, recoveries from spiked corn are found to be 75.1 to 99.4%, and relative standard deviations range from 1.7 to 5.1 (n = 6).
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页数：11
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