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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Determination of glyphosate and glufosinate in corn using multi-walled carbon nanotubes followed by ultra high performance liquid chromatography coupled with tandem mass spectrometry
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Determination of glyphosate and glufosinate in corn using multi-walled carbon nanotubes followed by ultra high performance liquid chromatography coupled with tandem mass spectrometry

机译：使用多壁碳纳米管在玉米中测定草甘膦和林膦酸盐，用串联质谱耦合超高效液相色谱法

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摘要

Glyphosate (Glyp) and glufosinate (Gluf) are widely used herbicides around the world, and their effects on human health and detection of levels have drawn increasing attention. The present study was to establish a method to determine the contents of Glyp and Gluf from corn using multi-walled carbon nanotubes (MWCNTs) followed by ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). The corn samples were purified by MWCNTs, then the analytes reacted with 9-fluorenylmethylchloroformate (FMOCCl) of acetonitrile solution (20.0 g/L) at 50 degrees C water bath in a borate buffer solution (50.0 g/L, pH=9) to generate FMOC derivative products. After the derivatization, HSS T3 was used as the separation column, with acetonitrile and 0.05% ammonia as the mobile phase, and multiple reaction monitoring (MRM) mode with negative electrospray ionization (ESI-) was adopted. The validation parameters showed good verification results, with both of their quantitative limits (LOQ) as 0.005 mg/kg, recoveries between 90.3% and 95.4%, intra-day relative standard deviations (RSDs) in the ranges of 1.24% and 3.35%, and inter-day RSDs between 3.56% and 6.06%. The analytical method, developed in this study, has high accuracy and sensitivity, and is suitable for the simultaneous detection of Glyp and Gluf in corn. (C) 2020 Elsevier B.V. All rights reserved.
机译：草甘膦（GLYP）和Glufosate（Gluf）在世界各地广泛使用除草剂，它们对人类健康和水平检测的影响越来越受到关注。本研究是建立一种方法，以使用多壁碳纳米管（MWCNT）从玉米中确定甘草和GluF的含量，然后用超高效液相色谱串联质谱（UHPLC-MS / MS）。通过MWCNTs纯化玉米样品，然后在硼酸盐缓冲溶液（50.0g / L，pH = 9）中，在50℃水浴中与乙腈溶液（20.0g / L）反应的分析物与乙腈溶液（20.0g / L）反应的分析物。产生FMOC衍生产品。在衍生化之后，HSS T3用作分离柱，用乙腈和0.05％氨作为流动相，并采用具有负电喷雾电离（ESI-）的多重反应监测（MRM）模式。验证参数显示出良好的验证结果，它们的定量限制（LOQ）为0.005mg / kg，回收率为90.3％和95.4％，日期相对标准偏差（RSD）为1.24％和3.35％，日内的日期间rsds 3.56％和6.06％。在本研究中开发的分析方法具有高精度和敏感性，并且适用于同时检测玉米中的甘油和Gluf。 （c）2020 Elsevier B.v.保留所有权利。

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