A dummy molecularly imprinted solid-phase extraction coupled with liquid chromatography-tandem mass spectrometry for selective determination of four pyridine carboxylic acid herbicides in milk

文献类型： 外文期刊

第一作者： Tan, Sijia

作者： Tan, Sijia;Yu, Hailong;He, Yahui;Wang, Miao;Hong, Sihui;Wang, MengQiang;Wang, Jing;Haclmuftuoglu, Ahmet;She, Yongxin;Tan, Sijia;Liu, Guiqiao;Li, Tengfei;Yan, Feiyan;Wang, Yanli;Abd El-Aty, A. M.;Abd El-Aty, A. M.;Haclmuftuoglu, Ahmet

作者机构：

关键词： Molecularly imprinted polymers; Pyridine carboxylic acid herbicides; Solid-phase extraction; Milk; Residue determination

期刊名称：JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES （ 影响因子：3.205； 五年影响因子：3.068 ）

ISSN： 1570-0232

年卷期： 2019 年 1108 卷

页码：

收录情况： SCI

摘要： We aim to develop a solid-phase extraction (SPE) based on a dummy molecularly imprinted polymer (MIP) and liquid chromatography-tandem quadrupole mass spectrometry (LC-MS/MS) for selective determination of four pyridine carboxylic acid herbicides (aminopyralid, picloram, fluroxypyr, and clopyralid) in milk samples. Using picloram as the dummy template, MIP nanocomposites with highly selective recognition and adsorption for the target molecule and its structural analogs were successfully synthesized by precipitation polymerization. Adsorption isotherms and kinetics were used to determine the adsorption performance and specific recognition mechanism of both MIPs and non-molecularly imprinted polymers (NIP). The Scatchard plot analysis revealed that two different binding sites were formed in the MIP with maximum binding capacity (Q(max)) of 1171.8 mu g.g(-1) and 3022.5 mu g.g -1 , respectively. Recovery at three spiking levels of 10, 20, and 50 mu g.L-I ranged between 75.3 and 89.8% with relative standard deviations (RSDs) < 14.3%.The limit of detection (LOD) was estimated to be 0.124 mu g.L-1. Finally, the feasibility of the proposed methodology was successfully applied to quantify aminopyralid and another three pyridine carboxylic acid herbicides in milk.

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