摘要
建立了怀牛夕等 5种中草药中六六六及滴滴涕异构体含量的气相色谱分析方法。样品以石油醚 +丙酮在索氏提取器中提取 ,提取液以浓硫酸净化。采用SE 30弹性石英毛细管柱分离样品 ,GC ECD检测六六六、滴滴涕农药的残留量。方法的线性范围为 5 .7× 10 - 7～ 2 .8× 10 - 4μg ;最小检测量为 1.3× 10 - 1 4～ 2 .5×10 - 1 2 g ;加样平均回收率为 88.8%～ 99.1% ;RSD为 0 .9%～ 5 .3%。
The capillary gas chromatographic method was introduced for determining organochlorine pesticide residues in Achyranthes bideritata, Adenophora stricta, Anemarrhena asphodeloides, Chinese yam and Atractylodes macrocephala. The, organochlorine pesticide were extracted from herb with mixed solvents ( petroleum ether+acetone), cleaned up by concentrated H2SO4, and separated by capillary column with electron capture detection. The capillary column was SE-30(30 m x 0.25 mm), carrier gas N-2 (99.999%,2.8 mL/min), split ratio: 3.5:1, injector temperature 220degreesC, detector temperature 280degreesC, column temperature program: 100degreesC (hold 2 min), rate of 5degreesC/min to 176degreesC, rate of 12degreesC/min to 250degreesC (hold 4 min). The average recoveries were within 88.8% similar to 99.1% and RSD was 0.9% similar to 5.3%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2003年第1期95-98,共4页
Chinese Journal of Analytical Chemistry
