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• 安全检测 •    下一篇

高效液相色谱串联质谱法同步检测大麦产品中唑啉草酯和炔草酯及解毒喹的残留量

韩何丹1,佘永新2,2,贺永娟1,何亚荟王猛强2,邵勇2,王淼2,王珊珊2,郑鹭飞2,曹振2,邵华2,金茂俊2,金芬2,王静2,高丽萍4   

  • 收稿日期:2018-11-06 修回日期:2019-12-20 出版日期:2020-03-25 发布日期:2020-03-23
  • 通讯作者: 佘永新 E-mail:0891syx@163.com
  • 基金资助:
    国家现代农业产业技术体系;国家自然科学基金

Simultaneous Determination of Pinoxaden and Clodinafop-propargyl and Cloquintocet-mexyl in Barley by High Performance Liquid Chromatography Tandem Mass Spectrometry

  • Received:2018-11-06 Revised:2019-12-20 Online:2020-03-25 Published:2020-03-23

摘要: 摘要:本文旨在利用QuEChERS方法建立高效液相色谱-串联质谱法同时检测大麦中的除草剂唑啉草酯和炔草酯及解毒喹的残留检测方法。样品用乙腈提取,C18和N-丙基乙二胺(PSA)净化,在XBridge-C18 色谱柱上分离,以0.1%甲酸溶液和乙腈作为流动相进行梯度洗脱,ESI 正离子模式扫描,多反应监测(MRM)测定,基质匹配外标法定量分析。大麦粒中唑啉草酯、炔草酯和解毒喹在0.1-100 μg/L 浓度范围内呈线性关系,相关系数高于0.997;方法的检出限(LOD)分别为0.05、0.02和0.01μg/L。唑啉草酯、炔草酯和解毒喹的精密度试验中3个加标水平(含残留限量)平均回收率在76.87%-103.55%之间,相对标准偏差(RSD)在2.4%-9.2%(n=5)之间。采用该方法对当地市场的大麦麦粒和大麦苗粉中上述三种化合物的残留进行了应用性评价,该方法将为大麦产品中唑啉草酯等三种化合物的残留检测提供了技术支撑。

关键词: 关键词:大麦, 唑啉草酯, 炔草酯, 解毒喹, 高效液相色谱-串联质谱

Abstract: Abstract: A method for simultaneous determination of two herbicides, pinoxaden, Clodinafop-propargyl and its safety agent Cloquintocet-mexyl in barely?by high performance liquid chromatography-tandem mass spectrometry with QuEChERS. The samples was extracted -by acetonitrile, cleaned up with C18 and PSA . The analytes were separated by a reversed phase C18 column(XBridge-C18 column) , and gradiently eluted with 0.1% formic acid solution and acetonitrile as mobile phase.? The samples?were?analyzed under the multiple reaction monitoring (MRM) mode with positive electrospray ionization (ESI+) and quantified?by external standard with matrix matched method. The good linearity was obtained from pinoxaden, Clodinafop-?propargyl and Cloquintocet-mexyl in barely?at the concentration of 0.1-100 μ g / L, and the linear correlation coefficient was higher than 0.997. Respectively, the limit of detection (LOD) of the method was 0.05, 0.02 μg/L and 0.01 μg/ L. The pinoxaden average recoveries of the three concentration levels were 76.87%- 80.722%, the Clodinafop-propargyl average recoveries of the three concentration levels were 95.07%-99.15%, and the Cloquintocet -mexyl average recoveries of the three concentration levels were 96.73%- 103.55%. The repeatability expressed as relative standard deviations (RSD) was ranged from 2.4% to 9.2%(n = 5).?The method was used to evaluate the residue of the above three compounds in local market barley grain and seedling powder. And the method provides technical support for the determination of pinoxaden residues in barley products.

Key words: Keywords: Barley, pinoxaden, clodinafop-propargyl, cloquintocet-mexyl, high performance liquid chromatography -tandem mass spectrometry

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