摘要
采用丙酮-正己烷（体积比1：1）均质提取样品，提取液经凝胶色谱仪净化，自动定量浓缩后，用气相色谱法（GC—ECD）测定，外标法定量。选择绿茶、花茶、乌龙茶、普洱茶为实验样品，测定硫丹残留量。该方法采用了自动净化、浓缩过程，使检测方法进一步快速、准确，重现性好。添加水平在0．01-0．10mg／kg时，该方法回收率范围为84．5％-98．0％；相对标准偏差为6．25％-8．77％；测定低限为0．01mg／kg。
One fast testing technology for the determination of endosulfan in tea by gas chromatography spectrometry was proposed. The test sample are extracted with hexane-acetone（1：1, by vol）. The extract is cleaned up by passing through one gel permeation chromatography（GPC）. The elutes solution is evaporated and made up to a definite volume. Determination is made by GC-ECD, using external standard method. RSDs from 6.25 to 8.77% and recoveries in the range from 84.5 to 98.0% were obtained in the test for precision and recovery. The limit of determination of this method is 0.01 mg/kg.
出处
《农药》
CAS
北大核心
2007年第12期839-840,845,共3页
Agrochemicals
关键词
气相色谱法
茶叶
硫丹
gas chromatography spectrometry
tea
endosulfan
