A method was developed for the determination of 11 triazole pesticides residues in fruits and vegetables using gas chromatography-mass spectrometry(GC-MS).The samples were homogeneous extracted with acetonitrile and then cleaned up by a solid phase extraction(Sep-Pak CarbonNH2) cartridge,eluted with acetonitrile-toluene(3∶1).The elution solvent was concentrated,solvent exchanged to constant volume,then determined by GC-MSD/SIM with the internal standard method.The calibration curves of 11 triazole pesticides were linear in the range of 0.05-5 ng with correlation coefficients of 0.996-1.000.The spiked recoveries of 11 triazole pesticides from five matrices(e.g.cabbage,tomato,apple,orange,spinach) at three spiked levels of 0.01,0.05,0.10 mg/kg were in the range of 80%-97% with relative standard deviations(RSDs,n=10) of 2.5%-8.4%.The limits of detection were 0.01 mg/kg for 11 triazole pesticides.The method is simple,sensitive,accurate and reliable.
关键词
气相色谱-质谱法蔬菜水果三唑类农药
Keywords
gas chromatography-mass spectrometry(GC-MS)vegetablesfruitstriazole pesticides