For more information about the substance, you may click one of the links below to take you to the relevant section. Quantitative analysis is performed by using the authentic standard to produce a calibration factor or calibration curve, and using the calibration data to determine the concentration of an anaiyte in the extract. The complete polychlorinated biphenyl compositions of two american products, aroclor 1242 and its more modern replacement, aroclor 1016, have been determined by gasliquid chromatography glc on twelve liquid phases of differing selectivities. Aroclor 1248 is a light yellow to yellowgreen colored, commercially available polychlorinated biphenyl product liquid mixture, that consists of tri, tetra, and pentachloro congeners. The new aroclor 1016 was made by distilling aroclor 1242. Description, aroclor 1248 is a commercial mixture of pcbs with an average chlorine. Comparison of the compositions of aroclor 1242 and aroclor 1016. It plays a role in how your page is seen by search engine crawlers, and how it appears in serps. Spex certiprep is accredited by a2la for organic and inorganic certified reference materials. This study evaluates aroclor 1260, a pcb mixture with congener composition mimicking that of human adipose tissue, and selected congeners, as potential ligands for these receptors utilizing human hepatomaderived hepg2 and primatederived cos1.
Predicted data is generated using the us environmental protection agencys episuite. Pdf complete pcb congener distributions for 17 aroclor mixtures. Pcb congener composition in a sediment sample collected on the west 4c2 and east sb23 side of hunters point shipyard south basin, and the pcb composition in a mixture of aroclors 12541260 and only aroclor. In addition to being registered as an iso 9001 facility, spex certiprep is accredited by a2la as complying with the requirements of isoiec 17025 and iso 17034. Frame 1997 also reported data on the composition of aroclor 1232 and 1248, analysed by one of the participating laboratories in his study referred to as jwc. Cas number iupac name type 36363 polychlorinated biphenyl pcb category. Identification of the substancemixture and of the companyundertaking. Aroclor 1254 is a widely studied commercial polychlorinated biphenyl pcb mixture which, by definition, contains 54% chlorine by weight. The wrw al of 12 4 ppm is for aroclors 1221, 1232, 1242, 1248, 1254, and 1260. Santa clara, ca 95636 application note abstract a unique method has been developed to. Production, importexport, use, and disposal chemical company produced aroclors 1221, 1232, 1242, 1248, 1254, 1260, 1262, and 1268. This test method describes the use or aroclors 1016, 1221, 1232, 1242, 1248, 1254, 1260, 1262, and 1268, as reference standards, but others could also be included.
Separate analyte names, cas numbers, or element abbreviations with a hard return enter key, or paste list directly into the box. Aroclor 1016 was a refined version of aroclor 1242 that contained a lower percentage of higher and lower chlorinated congeners. Aroclor 1242 high level pcb1242h organic standards. Polychlorinated biphenyls pcbs are a group of 209 synthetic organic compounds with 110 chlorine atoms attached to biphenyl. Analysis of the commercial feed used for this study revealed contamination with congeners specific for aroclor 1248, present in the parts per billion range. Although one might expect some 140 to 150 separate congeners in an aroclor, the actual analysis of aroclor 1248, for example, identified less than 50 peaks using highresolution gas chromatog. Their composition was previously analyzed by frame, cochran, and bowadt. This light yellow viscous liquid is a particularly highly chlorinated pcb mixture which, by definition, contains 54% chlorine by weight. Recent reports indicate substantial differences in the congener composition among aroclor lots and hence their biologic effects. Aroclor 1016 is a commercial mixture of polyclorinated biphenyls pcbs devoid of chlorinated dibenzofurans barsotti and van miller, 1984. Analyzing pcbs in source materials and environmental media. It is composed of mono to heptachlorinated homologs. Note that the progression of weathering resulted in altering aroclor 1242 to resemble standard aroclor 1248.
Pcb products are also manufactured in other countries, including germany, france, japan and the u. Polychlorinated biphenyls were once widely deployed as dielectric and coolant fluids in electrical apparatus, carbonless copy paper and in heat transfer fluids because of their longevity, pcbs are still widely in use, even though their manufacture has declined drastically since the 1960s. A polychlorinated biphenyl pcb is an organic chlorine compound with the formula c 12 h 10. Differences between the pcb aroclors oreilly, talbot. Pairs of different lots of aroclors 1248 and 1254 displayed markedly different. Aroclor 1254 produced no harmful effects regarding growth or mortality, but did produce enlarged livers with microscopic evidence of hepatic cellular injury. Epa region 4 technical services section issue paper for. Identification and quantitation of pcb aroclor mixtures in a single run using the agilent 7000b triple quadrupole gcms authors dale r. Pcb congener composition of aroclors 1248 top and 1260 bottom 19. A meta description is an html tag in the html code of your website, which allows you to customize a section of text that describes the page itself. Development of advisory levels for polychlorinated.
Pcb congener composition in a sediment sample collected on the west 4c2 and east sb23 side of hunters point shipyard south basin, and the pcb composition in a. In addition, data for aroclor 1016, 1242, 1254 and 1260 from a previous study schulz et al. Alteration of aroclor 1248 in foundry waste by volatilization. Aroclors 1016 and 1242 have similar capillary gas chromatography gc. Aroclor 1254 was admin to each rat 7, 28, and 49 days after the dena, and some rats were killed 21 days after each dose of aroclor. Pcb congener composition of aroclors a detailed analyses of the pcb congener distributions present in aroclors 1016, 1242, 1248, 1254, and 1260. Example aroclors produced included aroclor 1242, 1248, 1254, and 1260, among other aroclors. Pcb1248 polychlorinated biphenyl mixture with 48% chlorine. Us epa, oswer, office of resource conservation and recovery. The information in cameo chemicals comes from a variety of data sources.
A comparison of the strengths, weaknesses, and proper use of two alternative approaches. Congenerbased aroclor quantification and speciation techniques. I need to find the octanolwater partition coefficients, kow for aroclor 1248 and aroclor 1254 to compare the hydrophobicity of these two aroclors. Dale published november 2007 to be presented a1 wm 2008 phoenix wm symposia, inc. The byproduct of this distillation was subjected to an additional chlorination step and sold as aroclor 1254. Liver of rats that received aroclor 1254 on either day 7 or on day 28 contained in increased level of gammaglutamyltranspeptidase. Aroclor 1248 solution certified reference material, 500 mg. The hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. Sections i health hazard assessments for noncarcinogenic effects and.
Example of documented pcb dechlorination processes and. Aroclor 1248 is 56% tetrachloro congeners four chlorines, and aroclor 1262 is 47% heptachloro congeners seven chlorines. Pcb data set 1 is provided in the supplementary material on this books. Walker and fred feyerherm agilent technologies, inc.
Aroclor 1248, the aroclor used onsite and recovered from the floor inside the foundry r2 0. Aroclor 1254 is one of several commercial pcb mixtures that were marketed between the 1930s and 70s. Aroclor 1248 solution certified reference material, 200. Soil, water and air jim occhhialini jim okun patricia mcisaac. Supelco aroclor standard mix 1, aroclor standard 200 ugml dichloromethane 1x1ml, aroclor standard 200 ugml hexane 1x1ml. Aroclor 1242 had approximately 150 ppb of chlorinated dibenfurans, of which 43% was the toxic 2,3,7,9tetrachloro isomer. The concentration in the sample is calculated using the sample weight or volume and the extract volume. Comparison of composition of aroclor mixtures tested. Comparison of the compositions of aroclor 1242 and aroclor. Congenerspecific compositions of example marketed aroclors. Acute ingestion of transformer oil may cause abdominal pain, nausea, and vomiting. Acute exposure of liquid or vapor may cause irritation. Program and regulatory information about this substance, including links to epa applicationssystems, statuesregulations, or other sources that track or regulate this substance.
Congenerbased aroclor quantification and speciation. Contribution to the identification and quantitation of aroclor mixtures. Dale walker agilent gcms applications engineer t427 vs ar1248 standard. Small amounts of oil aspirated during ingestion or vomiting may cause lung damage. One of the three patterns matched unaltered aroclor 1248. Aroclor 1242 produced no ill effects on basis of mortality, growth, pathology, organ enlargement, liver function, or hematological changes.
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