玉米中三唑酮、三唑醇-a、三唑醇-b残留量的气相色谱-质谱检测

A residue method is described for simultaneous analysis of triadimefon,triadimenol-a,triadimenol-b in corn. The pesticides were extracted using acetonitrile from sample. Most lipids in co-extractives were removed by liquid-liquid extraction and gel permeation chromatography (GPC). lutein was removed using solid-phase extraction (SPE) on a LC-ENVI-Carb column. The pesticides were finally determined by gas chromatographymass spectrometry in selective-ion mode (SIM) simultaneously. The average recoveries for most pesticides (spiked level 0.05, 0. 5 and 2μg/g) were in the range of 90%-110%.The coefficient of variation (CV) of the method was lower than 10% in every case..