Caboni Pierluigi, Sarais Giorgia, Angioni Alberto, Garau Vincenzo Luigi, Cabras Paolo
Dipartimento di Tossicologia, Università di Cagliari, via Ospedale 72, 09124 Cagliari, Italy.
J Agric Food Chem. 2005 Nov 2;53(22):8644-9. doi: 10.1021/jf051345+.
A simple multiresidue method for screening analysis of 12 botanical insecticides used by organic farmers has been developed. The method involves a rapid and small-scale extraction procedure with acetonitrile. For all fruit and vegetable samples, there was no need for clean up. Rotenone, azadirachtin, ryanodines, and pyrethrins can be separated by high-performance liquid chromatography, quantified, and confirmed with a diode array detector (DAD) and atmospheric pressure chemical ionization mass spectrometry (APCI-MS) in the select ion-monitoring mode (SIM). The majority of pesticide recoveries for various fruits and vegetables were >70% in the concentration range from 0.01 to 5 mg/kg. The limit of quantitation for most of the pesticides was 0.01 mg/kg, with the majority of relative standard deviations (RSD) mostly below 10%.
已开发出一种用于筛查有机农户使用的12种植物源杀虫剂的简单多残留方法。该方法涉及使用乙腈进行快速小规模提取程序。对于所有水果和蔬菜样品,无需净化。鱼藤酮、印楝素、鱼尼丁和除虫菊酯可通过高效液相色谱分离、定量,并在选择离子监测模式(SIM)下用二极管阵列检测器(DAD)和大气压化学电离质谱(APCI-MS)进行确证。在0.01至5 mg/kg的浓度范围内,各种水果和蔬菜中大多数农药的回收率>70%。大多数农药的定量限为0.01 mg/kg,大多数相对标准偏差(RSD)大多低于10%。