气相色谱法测定人参中残留有机氯农药的含量

 目的：为测定人参中残留有机氯农药建立检测方法。方法：取不同产地人参，用丙酮-水（5∶30）提取，经Florisil分离柱纯化后，用气相色谱法对不同产地人参中残留的有机氯农药BHC和DDT的8种异物体（α-BHC，β-BHC，γ-BHC，δ-BHC，pp′-DDE，pp′-DDD，op′-DDT，pp′-DDT）进行定量分析。结果：检测结果可靠，精密度高，各供试品回收率均大于96．5％，RSD均小于2．8％。结论：该方法为正确评价和安全使用人参及药用人参的出口提供科学依据。

Determination of BHC isomers and DDT isomers in Panax ginseng by gas chromatography

OBJECTIVE: To collect BHC isomers and DDT isomers in Panax ginseng from three different areas. METHODS: The pesticides in Panax ginseng were extracted with acetone-water (5∶30). They were purified with hexaneethyl ether (17∶3) by Florisil column and separated on DB-1701 flexible glass capillary column and determined by election capillary detector (ECD). RESULTS: Good reproducibility, favaorable stability and high sensitivity were noted. The correlation coefficient of standard curves was larger than 0.99 and the recovery was higher than 96.5%. The relative standard deviation (RSD) were less than 2.8%. CONCLUSION: The results serve as a base for the evaluation of the quality of Panax ginseng.