摘要
建立了水果、蔬菜中抗蚜威、甲霜灵和克螨特残留量的气相色谱一串联质谱（E1源）检测方法。样品匀浆后经乙腈提取，提取液浓缩后用石墨氨基柱净化，用y（乙腈）：y（甲苯）=3：1的溶液淋洗。采用基质配制农药标准样品以校正基质效应引入的定量误差。3种农药的方法线性范围为0．002～0．500mg·kg^-1，在添加农药标准样品浓度0．002、0．010、0．050mg·kg^-1水平上，3种农药的平均回收率在91．6％～110．6％之间，相对变异系数RSD均低于15％，最低检出限为0．002mR·kg^-1。
Pirimicarb, metalayl, propargite in fruit and vegetable were determined by gas chromatography-tandem mass spectrometry （GC-MS/MS）. Samples were homogenized, then extracted with acetonitrile. The extracts were concentrated and cleaned up with graph- itized carbon black and aminopropyl cartridge. Pesticides were eluted with V（acetonitrile） ：V（ttoluene）=3 ： 1, and the eluates were concentrated. Quantitation was carried out using matrix-matched standard calibration. The linear range of detection for the method is be- tween 0. 002 and 0.5 mg· kg^-1. At the three fortification levels of 0. 002, 0. 010, 0. 050 mg ·kg ^-1, the average recovery rates are between 91.6% and 110.6% with precision val- ues expressed as relative standard deviation（RSD） lower or equal to 15~, and limits of quantification（LOQs） of three pesticides are all 0.002 mg·kg^- 1.
出处
《质谱学报》
EI
CAS
CSCD
2010年第4期220-223,共4页
Journal of Chinese Mass Spectrometry Society
