QuEChERS-气相色谱串联质谱法测定香菇中13种农药残留
2021-09-28任金萍赫嘉伟
任金萍 赫嘉伟


摘要:建立基于QuEChERS-气相色谱串联质谱法(GC-MS/MS)快速检测香菇中13种农药残留的分析方法。香菇样品经前处理后,气相色谱分离,多反应离子监测模式(MRM)进行质谱检测,用外标法定量。结果表明,在0.01、0.10、0.50 mg/kg三个添加水平下,回收率范围为75.4%~110.6%。用重复性限反映精密度,均符合标准GB 23200.113—2018的要求。QuEChERS-气相色谱串联质谱法快速、高效、可靠,适用于香菇样品中的农药残留检验检测。
关键词:香菇;农药残留;QuEChERS;气相色谱串联质谱法
中图分类号:S481 文献标志码:A 文章编号:1001-1463(2021)09-0046-05
doi:10.3969/j.issn.1001-1463.2021.09.011
Determination of 13 Pesticide Residuesin Lentinus edodes by QuEChERS-GC-MS/MS
REN Jinping 1, HE Jiawei 2
(1. Pingliang Center for Quality and Safety of Agricultural Products, Pingliang Gansu 744000; 2. School of Mathematics and Computer Science, Shaanxi University of Technology, Hanzhong Shaanxi 723000, China)
Abstract:A rapid method for the determination of 13 pesticide residues in Lentinus edodes was established based on QuEChERS-gas chromatography-mass spectrometry(GC-MS/MS). After pretreatment, the Lentinus edodes samples were separated by gas chromatography, detected by mass spectrometry in the multi-reaction ion monitoring mode(MRM), and quantitatively analyzed with the external standard method. The results showed that the 13 pesticides had good linearity in the range from 0.01 μg/mL to 0.8 μg/mL, and the correlation coefficients R2>0.99. The average recovery ranges were mainly from 75.4% to 110.6% at the three spiked concentration levels(0.01、0.10、0.50 mg/kg). The repeatability limit is used to reflect the precision, which all were accepted the requirements of standard GB 23200.113 — 2018. The method is rapid, efficient and reliable, which is suitable for the detection of pesticide residues in Lentinus edodes samples.
Key words:Lentinus edodes;Pesticide residues;QuEChERS;GC-MS/MS
香菇又称“中国蘑菇”,是我国著名的食用菌之一,被誉为“菇中皇后”,兼具食用和药用价值[1 - 4 ],是目前市场上主要的食用菌品种。香菇从生产到餐桌,可能会产生农药残留问题[5 - 8 ]。常用的农药残留分析前处理技术主要有固相萃取(SPE)、固相微萃取(SPME)、凝胶渗透色谱(GPC)、微波辅助萃取(MAE)、超临界流体萃取(SFE)等[9 - 12 ],但这些方法费时费力,不适合大批量样品的快速检测。而QuEChERS法作为近些年来被广泛推广应用的农残前处理技术, 因其快速、简单、高效、環保等优势,得到检验检测工作者的一致认可。平凉市农产品质量安全与检验检测中心科技人员以QuEChERS 方法作为前处理手段,采用多反应监测模式(MRM),建立了鲜香菇中13种残留农药快速、准确的分析方法,现报道如下。
1 材料与方法
1.1 供试材料
1.1.1 试剂耗材 提取包(4.0 g MgSO4、1.0 g NaCl、1.0 g柠檬酸钠、0.5 g柠檬酸氢二钠)、陶瓷均质子、净化管(150 mg PSA、900 mg MgSO4),均购于深圳逗点生物公司;乙腈、乙酸乙酯均为色谱级试剂,0.2 μm有机相微孔滤膜(美国安捷伦)。
1.1.2 仪器设备 ……
