title: [Determination of 6 kinds of pesticides residue in Dioscoreae rhizoma slices by GC-MS].
abstract: OBJECTIVE
  To determine the 6 residues including organophosphorus, organochlorinated and pyrethroid pesticides simultaneously in crude yam slices, yam slices stir-fried with bran and sulfur fumigation yam.
  
  
  METHODS
  The compounds were ready for GC-MS analysis after being extracted with acetonitrile and purified. Determinations were performed with selected ion monitoring mode and external standard method was adopted in the quantificaticon.
  
  
  RESULTS
  The contents of 6 kinds pesticides residue had good linear correlation with the peak area in the rang of 0.01-0.5 microg/mL. The average recoveries of 6 kinds pesticides residue were 87.5%-95.5%. The method detection limits ranged from 0.002-0.005 microg/g. Organochlorine and pyrethroid pesticides were detected in the three samples except the parathion residue.
  
  
  CONCLUSIONS
  Stir-fried with bran and sulphur fumigation had nearly no effects on the pesticides residue in yam. The method is sensitive and accurate and can be used in determination of multiresidual pesticides residue in yam.
authors.affiliation: Kangmei Pharmaceutical Limited Company, Puning 515341, China. jhy.ncdx@163.com
authors.forename: Yi-Hao
authors.initials: YH
authors.lastname: Jiang
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Cao
authors.forename: Liu-Rong
authors.initials: LR
authors.lastname: Yu
authors.forename: Fei-Jun
authors.initials: FJ
authors.lastname: Xiang
mesh_terms: D003890:Desiccation / Q000379:methods; D027742:Dioscorea / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D010945:Plants, Edible / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D011722:Pyrethrins / Q000032:analysis*; D015203:Reproducibility of Results; D027343:Rhizome / Q000737:chemistry; D012680:Sensitivity and Specificity
chemical_list: D006843:Hydrocarbons, Chlorinated; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D011722:Pyrethrins