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Abstract
A method for the determination of toxaphene in whole blood using gas chromatography (GC)-electron capture negative ion ECNI/MS and pure polychlorobornane congerners has been evaluated. Blood samples were extracted with hexane/acetone (9:1), extracts defatted with sulfuric acid, analytes fractionated on Carbopack-C/ Florisil (or silica gel) SPE columns then concentrated to final volumes for GC-ECNI/MS analysis. For confirmation, interference from PCBs and other organochlorine pesticides were removed by nitration.