title: Separation of chlorinated hydrocarbons and organophosphorus, pyrethroid pesticides by silicagel fractionation chromatography and their simultaneous determination by GC-MS.
abstract: A silicagel fractionation procedure for environmental sample extracts, which separates chlorinated hydrocarbons (CHCs) and organophosphorus, pyrethroid pesticides into two groups for subsequent instrumental analysis, was developed in this study. This method was achieved by optimizing the fraction cut-off volume of elution and different solvents. Using fully activated silica gel and cut-off CHCs collection after 10 ml 10% dichloromethane (DCM) in n-hexane passing through the column resulted in satisfactory separation of CHCs and organophosphorus, pyrethroid pesticides. This procedure had a higher reliability for CHCs than for organophosphorus, pyrethroid pesticides, because there is a relatively reliable recovery for CHCs. This approach is less expensive due to reducing sample pre-treatment time and solvent consumption.
authors.affiliation: Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
authors.forename: Li-gang
authors.initials: LG
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Yong-rong
authors.initials: YR
authors.lastname: Bian
authors.forename: Stephan
authors.initials: S
authors.lastname: Forster
authors.forename: Dieter
authors.initials: D
authors.lastname: Martens
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D002845:Chromatography / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D009943:Organophosphorus Compounds; D010575:Pesticides