摘要
目的:建立毛细管气相色谱法测定茶叶中12种有机氯农药残留量。方法:采用FDA方法提取、硫酸磺化后,以不分流进样方式用DB-1弹性石英毛细管柱经柱程序升温技术分离,并用电子捕获检测器检测,外标法计算含量。结果:三水平的平均回收率为80.1%～103.8%,RSD为0.52%～6.21%;被测样品中均含有不同程度的农药残留。结论:本方法快速、简便、准确、具有良好的通用性,可用于茶叶中12种有机氯农药残留量的测定。
Objective To determine 12 organochlorine pesticide residues in Tea by capillary gas chromatography with electron capture detector (CGC- ECD). Method Samples were extracted by FDA method. The capillary column was DB- 1(30m× 0.25mm × 0.25μ m);injector temperature was 250℃ and detector temperature was 280℃ ;The column temperature program was initial temperature 150℃ with rate of 15℃ /min to 180℃ (hold 1min), rate of 10℃ /min to 210℃ (hold 2min),and rate of 15℃ /min to 240℃ (hold 10min). The pesticide residues were calculated by external standard method. Results the average recoveries and RSD ranged from 80.1% to 103.8% and 0.52% to 6.21% respectively, at three spiked mixed organochlorine pesticide levels. All the samples showed organochlorine pesticide residues. Conglusion The method is easy in operation and has good separation and repeatability.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2001年第11期73-75,共3页
Food Science
关键词
茶叶
有机氯类农药
气相色谱法
残留量
测定
Tea Organochlorine pesticide residues Capillary gas chromatography
