title: [Determination of organochlorine pesticide multi-residues in Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao, Panax notoginseng (Burk.) F. H. Chen and P. quin quefolium L].
abstract: OBJECTIVE
  To determine 15 organochlorine pesticide residues in Astragalus membranaceus, Panax notoginseng and P. quinquefolium.
  
  
  METHODS
  The 15 organochlorine pesticides were extracted from samples with mixed solvents by ultrasonication, cleaned up by a column packed with Florisil, and then separated by capillary gas chromatography with electron capture detector(CGC-ECD). The capillary column was DB-5(15 m x 0.32 mm x 0.25 microns); injector temperature 240 degrees C; detector temperature 320 degrees C; the column temperature program initial 100 degrees C (hold 0.5 min), rate of 20 degrees C min-1 to 210 degrees C (hold 0.5 min), rate of 8 degrees C min-1 to 240 degrees C (hold 10 min). The column head-pressure was 58.84 kPa. The injection was splitless and the injection volume was 1 microliter.
  
  
  CONCLUSIONS
  The average recoveries and RSD are in the range of 78.30%-130.1% and 0.75%-31.9% at two spiked mixed organochlorine pesticide levels, respectively. All the samples have organochlorine pesticide residues.
authors.affiliation: Institute of Medicinal Plant, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100094, China.
authors.forename: S M
authors.initials: SM
authors.lastname: Zhang
authors.forename: H Z
authors.initials: HZ
authors.lastname: Gou
authors.forename: J M
authors.initials: JM
authors.lastname: Chen
mesh_terms: D027885:Astragalus propinquus / Q000737:chemistry*; D002849:Chromatography, Gas; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D005894:Panax / Q000737:chemistry* / Q000145:classification; D010573:Pesticide Residues / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues