QuEChERS-超高效液相色谱串联质谱法同时测定土壤中5种常用除草剂

QuEChERS-超高效液相色谱串联质谱法同时测定土壤中5种常用除草剂

建立了超高效液相色谱串联质谱法（UPLC-MS／MS）简单、快速、灵敏、准确地同时测定土壤中5种常用除草剂多残留量的方法。样品经改进的QuEChERS（快速、简单、廉价、高效、灵活和安全）方法一步完成萃取净化，未使用缓冲盐溶液，经乙腈萃取，N-丙基乙二胺（PSA）和C18吸附剂填料净化，离心后直接过膜上机检测，萃取和净化的效果满足检测要求。UPLC—MS／MS方法采用WatersACQUITY UPLC^TM BEH C18（50mm×2.1mm i.d,1．7μm）色谱柱，柱温30℃，流动相为甲醇和水，梯度洗脱，流速0．25mL／min，电喷雾电离源正离子（ESI^＋）多反应监测（MRM）模...

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Bibliographic Details
Published in:分析化学 Vol. 39; no. 11; pp. 1659 - 1664
Main Author: 梅梅 杜振霞 陈芸
Format: Journal Article
Language:Chinese
Published: 北京化工大学理学院,北京,100029 2011
Subjects:
QuEChERS方法
土壤
多种残留
超高效液相色谱串联质谱法
除草剂
QuEChERS方法
除草剂
多种残留
超高效液相色谱串联质谱法
土壤
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Summary:建立了超高效液相色谱串联质谱法（UPLC-MS／MS）简单、快速、灵敏、准确地同时测定土壤中5种常用除草剂多残留量的方法。样品经改进的QuEChERS（快速、简单、廉价、高效、灵活和安全）方法一步完成萃取净化，未使用缓冲盐溶液，经乙腈萃取，N-丙基乙二胺（PSA）和C18吸附剂填料净化，离心后直接过膜上机检测，萃取和净化的效果满足检测要求。UPLC—MS／MS方法采用WatersACQUITY UPLC^TM BEH C18（50mm×2.1mm i.d,1．7μm）色谱柱，柱温30℃，流动相为甲醇和水，梯度洗脱，流速0．25mL／min，电喷雾电离源正离子（ESI^＋）多反应监测（MRM）模式检测，外标法定量。5种常用除草剂在0．5-200μg／L范围内线性关系良好，相关系数为0．9947～0．9984。在4和40μg/kg水平下的平均加标回收率为75．4％～98．5％；相对标准偏差为3．2％～11．8％；方法的检出限（S／N=3）为0．0050．020pg／kg，定量限（S／N=10）为0．017-0．067μg/kg.
Bibliography:Ultra performance liquid chromatography tandem mass speetrum;Herbicides;Multi-residue; Soil;QuEChERS method
A simple, rapid sensitive and accurat mass spectrometry （UPLC-MS/MS） method was e ultra performance liquid chromatography tandem developed for the simultaneous determination of five currently used herbicides in soil. The sample preparation using the modified QuEChERS （quick, easy, cheap, effective, rigged, and safe） method completed the extraction and clean-up steps in one procedure. In this none buffer QuEChERS method, samples were extracted with acetonitrile, cleaned up with primary secondary amine （PSA） and C18 sorbent, then centrifugated and filtrated before detection. The pretreatment method was simple, rapid and effective and can meet the detection requirements. The UPLC-MS/MS method was performed on Waters ACQUITY UPLCTM BEH C18 （50 mm×2.1 mm i. d. , 1.7 lam） and the column temperature was 30℃, the gradient elution with methanol and pure water as the mobile phase and the flow rate was 0.25 mL/min.
ISSN:0253-3820
DOI:10.3724/SP.J.1096.2011.01654