title: By-side chlorodibenzo-P-dioxins and chlorodibenzofurans in technical chlorobiphenyl formulations of aroclor 1268, chlorofen, and clophen T 64.
abstract: Aroclor 1268, Chlorofen, and Clophen T 64 technical chlorobiphenyl formulations were examined for 75 congeners of chlorodibenzo-p-dioxin (CDD) and 135 congeners of chlorodibenzofuran (CDF) using isotope dilution technique, separation, and enrichment on silica gel impregnated with activated carbon and final high resolution gas chromatography (HRGC)/high resolution mass spectrometry (HRMS) quantification. Three the most highly chlorinated congeners of CDD were found in Aroclor 1268, Chlorofen, and Clophen T 64. In the case of CDF, the number of congeners identified was 108 with 44 coeluting in pairs and 3 in triplicate in Aroclor 1268, 16 with 4 coeluting in pairs in Chlorofen, and 88 with 46 coeluting in pairs and 3 in triplicate in Clophen T 64. The total CDD and CDF concentrations of Aroclor 1268, Chlorofen, and Clophen T 64 were 24, 160, and 8.5 ng/g and 1600,270,000, and 4000 ng/g, respectively. No mono- to hexa-CDDs could be quantified in Aroclor 1268 (<0.03 to <1 ng/g), Chlorofen (<0.07 to <0.3 ng/g), or Clophen T 64 (<0.007 to <2 ng/g), whereas two hepta-CDDs and octa-CDD were found in all three formulations, and Chlorofen was richer in those compounds, followed by Aroclor 1268 and Clophen T 64.
authors.affiliation: Department of Environmental Chemistry & Ecotoxicology, University of Gdańsk, Gdańsk, Poland. jfalandy@pcb.chem.univ.gda.pl
authors.forename: J
authors.initials: J
authors.lastname: Falandysz
authors.forename: K
authors.initials: K
authors.lastname: Nose
authors.forename: A
authors.initials: A
authors.lastname: Mostrag
authors.forename: Y
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Noma
authors.forename: S
authors.initials: S
authors.lastname: Sakai
mesh_terms: D001140:Aroclors / Q000737:chemistry* / Q000592:standards; D001572:Benzofurans / Q000032:analysis*; D000072338:Dibenzofurans, Polychlorinated; D004003:Dichlorophen / Q000031:analogs & derivatives* / Q000737:chemistry / Q000592:standards; D004785:Environmental Pollutants / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000737:chemistry* / Q000592:standards; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis
chemical_list: C492961:Aroclor 1268; D001140:Aroclors; D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004785:Environmental Pollutants; D000072317:Polychlorinated Dibenzodioxins; C506197:clophen T 64; C004660:clorophene; D011078:Polychlorinated Biphenyls; D004003:Dichlorophen