超声波辅助提取-气相色谱法同时测定湿毒清片中14种有机磷农药残留

Simultaneous Determination of 14 Organophosphorus Pesticide Residues in Shiduqing Pills by Ultrasonic-assisted Extraction and Gas Chromatography

建立了超声波辅助提取-气相色谱法同时检测湿毒清片中14种有机磷农药残留的方法。样品采用乙酸乙酯超声提取，通过石墨化炭黑净化，采用气相色谱-火焰光度法（GC—FPD）进行检测。除乐果以外，13种有机磷农药于0．1mg／kg、0．5mg／kg两个加标水平的回收率在80．4％～114．5％之间，相对标准偏差为0．6％～12．4％。方法满足农残分析的要求，可用于湿毒清片中14种有机磷农药残留量的检测。

A gas chromatographic method for the simultaneous determination of 14 organophosphorus pesticides in shiduqing pills was established. Samples were extracted by ethyl acetate. Cleanup of the extracts was performed with graphitized carbon black. The determination of pesticides in the final extracts was performed by GC-FPD. Under optimized conditions, except for dimethoate, the recoveries of 13 organophosphorus pesticides were from 80.4%-114.5%,at spiked levels at 0.1 mg/kg and 0.5 mg/ kg,and RSDs ranged from 0.6%-12.4%. The method could meet the requirements of pesticide residue analysis and could be effectively used to analyse the organophosphorus residues in Shiduqing pills sold.