Deng Huifen, Zhang Jianying, Huang Ke, Zhong Tiantian, Lin Limin
Food Inspection & Quarantine Center, Shenzhen Customs, Shenzhen 518045, China.
Se Pu. 2018 Dec 8;36(12):1211-1222. doi: 10.3724/SP.J.1123.2018.09012.
After optimization of the QuEChERS pretreatment method, combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology, a multi-residue determination method was established for 105 typical insecticides, bactericides, herbicides, and plant growth regulators in vegetables. The target compounds were extracted by acetonitrile, purified with 150 mg primary secondary amine (PSA), 150 mg EC-C18, and 30 mg graphitized carbon black (GCB) adsorbents. The standard curves of 105 target compounds were linear in the concentration range of 0.010-0.200 mg/L, with correlation coefficients ()>0.99. The limit of quantification was 0.010 mg/kg, the recoveries were between 68.2% and 108% at three spiked levels, and the RSDs of the method were between 1.02% and 11.8%. The method is suitable for the rapid determination of the common pesticides in vegetables owing to its advantages of rapidity, simplicity, and better purification.
对QuEChERS预处理方法进行优化后，结合液相色谱-串联质谱（LC-MS/MS）技术，建立了一种同时测定蔬菜中105种典型杀虫剂、杀菌剂、除草剂及植物生长调节剂的多残留检测方法。目标化合物用乙腈提取，再用150 mg伯仲胺（PSA）、150 mg EC-C18和30 mg石墨化炭黑（GCB）吸附剂进行净化。105种目标化合物的标准曲线在0.010 - 0.200 mg/L浓度范围内呈线性，相关系数（）>0.99。定量限为0.010 mg/kg，在3个加标水平下回收率为68.2% - 108%，方法的相对标准偏差（RSD）为1.02% - 11.8%。该方法具有快速、简便、净化效果好等优点，适用于蔬菜中常见农药的快速检测。
