Analysis of four sulfonylurea herbicides in cereals using modified Quick, Easy, Cheap, Effective, Rugged, and Safe sample preparation method coupled with liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

第一作者： Ni, Yanxia

作者： Ni, Yanxia;Yang, Huan;Zhang, Hantong;He, Qiao;Huang, Siqi;Qin, Meiling;Chai, Shuangshuang;Gao, Huanhuan;Ma, Youning

作者机构：

关键词： Sulfonylurea herbicides;Primary-secondary amine;High-performance liquid chromatography-electro-spray ionization-tandem mass spectrometry;Modified QuEChERS method;Cereals

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

ISSN： 0021-9673

年卷期： 2018 年 1537 卷

页码：

收录情况： SCI

摘要： A modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) sample preparation method, coupled with liquid chromatography-electrospray ionization tandem mass spectrometry, has been developed for the simultaneous analysis of four commonly used sulfonylurea herbicides, ethoxysulfuron, halosulfuron-methyl, mesosulfuron-methyl and orthosulfamuron, in rice, maize, wheat and soybean. Adsorption of the analytes onto the primary-secondary amine used in the clean-up step was avoided by using 1% formic acid in acetonitrile as the extraction solvent to maintain the acidic herbicides in a non ionized state. Trueness studies were carried out at three levels (2.5, 25 and 250 mu g/kg for ethoxysulfuron and 5, 50 and 500 mu g/kg for the other three analytes). Promising trueness (70.2%-119.8%) was achieved for all herbicides in all matrices after clean-up, with relative standard deviations (RSDr) < 18.6%. Satisfactory matrix effects (-19.7% to 14.8%) were also obtained. Good linearity of the calibration curves was achieved, with determination coefficients (r) >= 0.9956, when the concentration of ethoxysulfuron was in the range 0.5-50 mu g/L. and that of the other three analytes was in the range 1.0-500 mu g/L. The RSDWR for within-laboratory reproducibility was 5.7%. The validated method was successfully used to analyze real samples. (C) 2018 Elsevier B.V. All rights reserved.

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