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新型 dummy 分子印迹聚合物用于基质固相分散萃取法从鱼样中提取八种氟喹诺酮类药物。

Novel dummy molecularly imprinted polymers for matrix solid-phase dispersion extraction of eight fluoroquinolones from fish samples.

机构信息

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

出版信息

J Chromatogr A. 2014 Sep 12;1359:1-7. doi: 10.1016/j.chroma.2014.07.007. Epub 2014 Jul 12.

Abstract

A series of novel dummy molecularly imprinted polymers (DMIPs) were prepared as highly class-selective sorbents for fluoroquinolones. A non-poisonous dummy template, daidzein, was used for the first time to create specific molecular recognition sites for fluoroquinolones in the synthesized polymers. The influence of porogen polarity on dummy molecular imprinting effect was studied. The DMIP prepared using dimethylsulfoxide-acetonitrile (1:1.8, v/v) as porogen achieved the highest imprinting factors (IF) for fluoroquinolones over a range of IF 13.4-84.0. This DMIP was then used for selective extraction of eight fluoroquinolones (fleroxacin, ofloxacin, norfloxacin, pefloxacin, ciprofloxacin, lomefloxacin, enrofloxacin and gatifloxacin) from fish samples based on dummy molecularly imprinted matrix solid-phase dispersion (DMI-MSPD). The extracted fluoroquinolones were subsequently analyzed by high-performance liquid chromatography (HPLC) equipped with a fluorescence detector (FLD). The developed method had acceptable recoveries (64.4-102.7%) and precision (RSDs: 1.7-8.5%, n=5) for determination of fluoroquinolones in fish samples fortified at levels of 10 and 100ngg(-1). The limits of detection (LODs) for identification of eight fluoroquinolones ranged between 0.06 and 0.22ngg(-1). The results demonstrated great potential of the optimized method for sample preparation in routine analysis of trace fluoroquinolones in fish samples.

摘要

一系列新型的虚拟分子印迹聚合物(DMIPs)被制备为用于氟喹诺酮类药物的高选择性吸附剂。首次使用一种无毒的虚拟模板大豆苷元,在合成聚合物中为氟喹诺酮类药物创建特定的分子识别位点。研究了致孔剂极性对虚拟分子印迹效应的影响。以二甲基亚砜-乙腈(1:1.8,v/v)为致孔剂制备的 DMIP 对氟喹诺酮类药物的印迹因子(IF)最高,范围为 13.4-84.0。然后,该 DMIP 用于基于虚拟分子印迹基质固相分散(DMI-MSPD)从鱼样中选择性萃取八种氟喹诺酮类药物(氟罗沙星、氧氟沙星、诺氟沙星、培氟沙星、环丙沙星、洛美沙星、恩诺沙星和加替沙星)。用配备荧光检测器(FLD)的高效液相色谱(HPLC)对提取的氟喹诺酮类药物进行分析。该方法用于测定鱼样中 10 和 100ngg(-1)水平添加的氟喹诺酮类药物时,具有可接受的回收率(64.4-102.7%)和精密度(RSDs:1.7-8.5%,n=5)。八种氟喹诺酮类药物的检测限(LODs)在 0.06-0.22ngg(-1)之间。结果表明,该优化方法在鱼样中痕量氟喹诺酮类药物的常规分析中具有很大的样品制备潜力。

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