QuEChERS结合气相色谱－负化学源质谱法测定蔬菜水果中37种农药残留
目的 建立气相色谱－负化学源质谱法(gas chromatography-negative chemical ionization, GC-MS/NCI)测定果蔬中37种农药残留量的方法。方法 蔬菜水果样品由乙腈提取、QuEChERS净化, 采用GC-MS/NCI测定, 外标法定量。结果 在20~500 μg/L范围内37种农药的线性良好(相关系数r2>0.995), 所有农药的方法定量限在0.03~0.67 μg/kg之间; 芹菜和梨在0.01 mg/kg加标水平下, 37种农药的平均回收率范围为86.2%~110%且相对标准偏差(n=6)均小于10%。结论 该方法简便、快捷、回收率及精密度好, 可以成为检测果蔬中农药残留的常规检测技术, 其建立的质谱条件也可以成为农药确证的另一手段。
Objective To establish a gas chromatography-negative chemical ionization mass spectrometry (GC-MS/NCI) method for the determination of 37 pesticide residues in fruits and vegetables. Methods The fruit and vegetable samples were extracted with acetonitrile, cleaned up with QuEChERS, detected by GC-MS/NCI, and quantified by external standard method. Results The linearity of 37 pesticides was good in the range of 20–500 μg/L (correlation coefficient r2>0.995), and the quantitative limit of all pesticides was 0.03–0.67 μg/kg. The average recoveries of 37 pesticides in celery and pear were 86.2%–110% and relative standard deviations (n=6) were less than 10% at 0.01 mg/kg standard addition level. Conclusion The method is simple, rapid, and has good recovery and precision. It can be used as a routine detection technology for pesticide residues in fruits and vegetables, and the mass spectrometry conditions established by the method can also be used as another means for pesticide confirmation.
标题：QuEChERS结合气相色谱－负化学源质谱法测定蔬菜水果中37种农药残留
英文标题：Determination of 37 pesticide residues in vegetables and fruits by QuEChERS coupled with gas chromatography-negative chemical ionization mass spectrometry
作者：
李燕妹 福建省产品质量检验研究院
连增维 吉克检测技术(福建)有限公司
中文关键词:果蔬,QuEChERS,农药残留,气相色谱-负化学源质谱法,
英文关键词:vegetables and fruits,QuEChERS,pesticide residues,gas chromatography-negative chemical ionization,
发表日期：2020-05-11
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