title: Determination of [3H]-2,3,7,8-tetrachlorodibenzo-p-dioxin in human feces to ascertain its relative metabolism in man.
abstract: Human feces samples from a self-dosing experiment were analyzed by gas chromatography/mass spectrometry (GC/MS) for [3H]-2,3,7,8-tetrachlorodibenzo-p-dioxin (3H-2378-TCDD) to determine that 36-44% of the radioactivity was attributable to the parent compound. This method, using isotope dilution analysis, proved to be difficult due to the unexpectedly higher native 2378-TCDD background which created abnormally large precision ranges around the calculated feces concentrations of 0.1-0.2 pg/g. These results were supported by additional analyses involving the GC/MS chemical cleanup method combined with liquid scintillation counting which showed that at most, 50% of the radioactivity was due to 2378-TCDD metabolites resulting in a minimum metabolism of 50% for these samples.
authors.affiliation: Monsanto Company, St. Louis, Missouri 63167.
authors.forename: J M
authors.initials: JM
authors.lastname: Wendling
authors.forename: R G
authors.initials: RG
authors.lastname: Orth
authors.forename: H
authors.initials: H
authors.lastname: Poiger
mesh_terms: D004147:Dioxins / Q000378:metabolism*; D005243:Feces / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D000072317:Polychlorinated Dibenzodioxins / Q000378:metabolism*; D014316:Tritium
chemical_list: D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D014316:Tritium