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目的比较几种中草药中的农药残留量的测定方法。方法分别用胶束毛细管电泳在线推扫富集技术(MEKC on-line Sweeping)和毛细管气相色谱法(CGC)对几种中草药中农药残留量进行测定,比较2种方法的样品预处理条件、检测条件、线性、精密度、回收率、最低检测限和样品测定结果。结果MEKC on-line Sweeping样品预处理方法简单,检测范围广;CGC法检测限低。2种方法的精密度、回收率、样品测定结果无显著性差异。结论MEKC on-line Sweeping和CGC各有其特点,但CGC不能直接用于检测低挥发性的农药如吡虫啉,2种方法检测限均低于各国标准,能够用于中草药中农药残留的测定。
Objective To compare the determination of pesticide residues in several Chinese herbal medicines. Methods MEKC on-line sweeping and capillary gas chromatography (CGC) were used to determine the pesticide residues in several Chinese herbal medicines. The pretreatment conditions of the two methods were compared and detected Conditions, linearity, precision, recovery, minimum limit of detection and sample measurement results. Results MEKC on-line Sweeping sample pretreatment method is simple, a wide range of detection; CGC method detection limit is low. There was no significant difference between the two methods in terms of precision, recovery, and sample determination. Conclusions MEKC on-line Sweeping and CGC have their own characteristics, but CGC can not be directly used to detect low-volatile pesticides such as imidacloprid, the detection limits of the two methods are lower than the national standards, can be used for the determination of pesticide residues in Chinese herbal medicine.