title: Chiral analysis of organochlorine pesticides in Alabama soils.
abstract: The enantiomeric composition of organochlorine (OC) pesticide residues was investigated in 32 agricultural and 3 cemetery soils from Alabama. The enantiomeric signatures were similar to those from other soils in US and Canada. The enantiomer fractions (EFs) of o,p'-DDT showed great variability, ranging from 0.41 to 0.57 while the EFs of chlordanes and chlordane metabolites were less variable and differed in general significantly from racemic. Enantioselective depletion of (+)trans-chlordane, (-)cis-chlordane, the first eluting enantiomer of MC5, and enrichment of (+)heptachlor-exo-epoxide and (+)oxychlordane was found in a large majority of the samples with detectable residues. The enantiomeric composition of alpha-hexachlorocyclohexane was racemic or close to racemic.
authors.affiliation: Department of Chemistry, Environmental Chemistry, Umeå University, Sweden. karin.wiberg@chem.umu.se
authors.forename: K
authors.initials: K
authors.lastname: Wiberg
authors.forename: T
authors.initials: T
authors.lastname: Harner
authors.forename: J L
authors.initials: JL
authors.lastname: Wideman
authors.forename: T F
authors.initials: TF
authors.lastname: Bidleman
mesh_terms: D000383:Agriculture; D000407:Alabama; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis / Q000737:chemistry*; D007536:Isomerism; D009027:Mortuary Practice; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues; D012989:Soil Pollutants