【摘要】 目的:建立山楂中15种有机磷农药残留量同时检测的分析方法。方法:样品以混合溶剂超声提取,Florisil固相萃取柱净化处理后,采用DB-5毛细管气相色谱柱分离样品,火焰光度检测器检测,外标法定量。结果:在1~10ng.g-1添加范围内,15种有机磷农药的回收率为83.2%~90.8%;相对标准偏差(RSD)为3.1%~5.6%;最低检测限为0.05~0.1ng.g-1(S/N=3)。结论:此方法简便、可靠,可用于山楂中的有机磷农药残留量测定。更多还原

【Abstract】 This study aimed to establish the method for simultaneous determination of 15 types of organophosphorus pesticide residues in hawthorn(Crataegus pinnatifida var.major).After ultrasound-assisted extraction of sample from mixed solvent,the extract was purified by Florisil solid-phase clean-up column.Then,the extract was separated by capillary column and detected by flame photometric detector.Results showed that the average recovery of 15 types of organophosphorus pesticide residues spiked at levels of 1-10 ng·g-1.It ranged from 83.2% to 90.8%.The relative standard deviation(RSD) is 3.1%-5.6%.The detection limit for 15 organophosphorus pesticide residues is 0.05-0.1 ng·g-1(S/N=3).It is concluded that contents of 15 organophosphorus pesticide residues in hawthorn are determined.The established method can be used in the simultaneous determination of contents of organophosphorus pesticide residues.更多还原