李晓晶 女技师 硕士生研究方向为理化检验 E-mail:saiint@ 163. com
TS207.5
目的建立茶叶中三氯杀螨醇和7种拟除虫菊酯类农药的检测方法。方法以丙酮作为提取溶剂,提取液经石墨碳黑/氨基(Carbon/NH2)固相萃取小柱净化后,用DB-5毛细管柱分离,采用气相色谱-电子捕获检测器(GC-ECD)进行测定。结果三氯杀螨醇和拟除虫菊酯类农药在20～800μg/L范围内线性良好,相关系数(r)均在0.998以上,最低检出限为0.23～1.38μg/kg,样品的加标回收率在88.5%～106.4%之间,相对标准偏差(RSD)在2.5%～10.7%之间。结论本方法净化效果
Objective To establish a method of determining dicofol and seven pyrethroid pesticide residues in tea.Methods Pesticide residues were extracted from tea samples by using acetone.Extracts were cleaned up by Carbon/NH2 SPE column.Pesticides were
李晓晶.固相萃取结合气相色谱法测定茶叶中三氯杀螨醇和拟除虫菊酯类农药残留[J].中国食品卫生杂志,2011,23(4).
