摘要
目的:建立银杏叶中3种氨基甲酸酯农药残留量的测定方法。方法:样品以丙酮超声提取,并采用弗罗里硅土柱进行净化,选用气相色谱与质谱串联技术(GC-MS)在DB-5MS毛细管柱上用程序升温技术分离,采用选择离子检测方式,以保留时间和特征离子进行目标成分的定性鉴别,外标法对样品进行测定。结果:3种氨基甲酸酯农药在100～1000μg.L-1范围内呈良好的线性关系,3种农药的方法定量限在5.0～6.0μg.kg-1,3个水平添加回收率在83.30%～89.53%之间,RSD小于10%(n=9)。结论:本方法灵敏度高,重现性好,可用于银杏叶中3种氨基甲酸酯类农药残留的检测。
Objective：To establish an analytical method for the simultaneously determination of 3 Carbamate in Ginkgo biloba.Methods：The sample was extracted with acetone,and the extract was cleaned using Florisil,The eluate was concentrated under nitrogen blowing.Based on GC-MS,the pesticides were separated with a DB-5MS column using a temperature program and were detected with a mass selective detector in selective ion monitoring（SIM）mode.The target pesticides were identified by comparing their retention times and characteristic ions with reference.Results：The linearity of the method was good within 100 and 1000 μg·L-1,and all the limits of quantification（LOQs）were within 5.0 and 6.0 μg·kg-1.The average spiked recoveries in three levels were 83.30%-89.53% with relative standard deviations（RSD）below 10%（n=9）.Conclusion：The method is sensitive for the residue analysis of 3 Carbamate in Ginkgo biloba.
出处
《药物分析杂志》
CAS
CSCD
北大核心
2011年第7期1379-1380,共2页
Chinese Journal of Pharmaceutical Analysis
