【摘要】 [目的]建立黄芪甘草中分析有机氯农药六六六(BHC),滴滴涕(DDT),五氯硝基苯(PCNB)残留量的一种毛细柱气相色谱的分析方法.[方法]样品以丙酮提取,在氯化钠存在下,以二氯甲烷进行液液分配,用浓硫酸磺化,采用弹性石英毛细管柱Rtx-225(30m*0.32mm*0.10um)及电子捕获检测器(ECD),外标法计算含量.[结果]加样回收率在90.43%~104.58%,RSD%为0.05%~4.28%,样品中检出的有机氯农药残留量总六六六(BHC)小于200ng/g,总滴滴涕(DDT)小于200ng/g,五氯硝基苯(PCNB)小于100ng/g,均符合国家标准.[结论]该法适用于测定黄芪甘草中的有机氯农药残留量.更多还原

【Abstract】 Objective:To establish a simple and rapid GC method for determining the residues of organochlorine pesticide BHC,DDT,PCNB in Radix Astragali and Liqurice.Method: The samples are extracted by acetone and purified with sulfuric acid.The column is Rtx-225(30 m×0.32mm ×0.10um).The electron capture detector(ECD) is used.The external standard method is used.Result: The recoveries and RSD ranged from 90.43% to 104.58% and 0.05% to 4.28% respectively,at three spiked levels.The results show that the contents of total DDT,total BHC and PCNB in Radix Astragali and Liqurice.are accordingthe permissible maximum limits of the National Standard.Conclusion: The method can be used to determine organochlonine pesticide in medicinal plant s and preprations.更多还原