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. The new aroclor 1016 was made by distilling aroclor 1242. Where can i find partition coefficients, kow for pcbs. Persistence and degradability aroclor 1248 standard persistence and degradability may cause longterm adverse effects in the environment. Example of documented pcb dechlorination processes and. A polychlorinated biphenyl pcb is an organic chlorine compound with the formula c 12 h 10. I need to find the octanolwater partition coefficients, kow for aroclor 1248 and aroclor 1254 to compare the hydrophobicity of these two aroclors.
Aroclor 1016 is a commercial mixture of polyclorinated biphenyls pcbs devoid of chlorinated dibenzofurans barsotti and van miller, 1984. Comparison of the compositions of aroclor 1242 and aroclor. One of the three patterns matched unaltered aroclor 1248. Contribution to the identification and quantitation of aroclor mixtures. 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. Their composition was previously analyzed by frame, cochran, and bowadt. Example aroclors produced included aroclor 1242, 1248, 1254, and 1260, among other aroclors. The information in cameo chemicals comes from a variety of data sources. Pairs of different lots of aroclors 1248 and 1254 displayed markedly different.
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. Congenerspecific compositions of example marketed aroclors. Supelco aroclor standard mix 1, aroclor standard 200 ugml dichloromethane 1x1ml, aroclor standard 200 ugml hexane 1x1ml. Us epa, oswer, office of resource conservation and recovery. Pcb products are also manufactured in other countries, including germany, france, japan and the u. Small amounts of oil aspirated during ingestion or vomiting may cause lung damage. Pcb data set 1 is provided in the supplementary material on this books. In addition, data for aroclor 1016, 1242, 1254 and 1260 from a previous study schulz et al. Aroclor 1248 is a commercial mixture of pcbs with an average chlorine content of 48%.
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. Pcb congener composition of aroclors 1248 top and 1260 bottom 19. Identification and quantitation of pcb aroclor mixtures in. Aroclor 1254 is one of several commercial pcb mixtures that were marketed between the 1930s and 70s. Separate analyte names, cas numbers, or element abbreviations with a hard return enter key, or paste list directly into the box. Identification of the substancemixture and of the companyundertaking. Aroclor 1248 solution certified reference material, 500 mg. Aroclor 1016 was a refined version of aroclor 1242 that contained a lower percentage of higher and lower chlorinated congeners. 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.
Comparison of composition of aroclor mixtures tested. Recent reports indicate substantial differences in the congener composition among aroclor lots and hence their biologic effects. The byproduct of this distillation was subjected to an additional chlorination step and sold as aroclor 1254. Aroclor 1248 is 56% tetrachloro congeners four chlorines, and aroclor 1262 is 47% heptachloro congeners seven chlorines. Pcb1248 polychlorinated biphenyl mixture with 48% chlorine. Aroclor 1242 high level pcb1242h organic standards. Aroclor 1248 solution certified reference material, 200. Predicted data is generated using the us environmental protection agencys episuite. Sections i health hazard assessments for noncarcinogenic effects and. For more information about the substance, you may click one of the links below to take you to the relevant section. Usa home product directory analyticalchromatography analytical standards additional standards chromatography environmental standards aroclors, pcbs, and dioxins aroclors analytical chromatography home. Differences between the pcb aroclors oreilly, talbot. Congenerbased aroclor quantification and speciation. Pcb congener composition of aroclors a detailed analyses of the pcb congener distributions present in aroclors 1016, 1242, 1248, 1254, and 1260.
Aroclor 1254 is a widely studied commercial polychlorinated biphenyl pcb mixture which, by definition, contains 54% chlorine by weight. Spex certiprep is accredited by a2la for organic and inorganic certified reference materials. 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. Santa clara, ca 95636 application note abstract a unique method has been developed to. Towards a global historical emission inventory for. Comparison of the compositions of aroclor 1242 and aroclor 1016. Epa region 4 technical services section issue paper for. It plays a role in how your page is seen by search engine crawlers, and how it appears in serps. The wrw al of 12 4 ppm is for aroclors 1221, 1232, 1242, 1248, 1254, and 1260.
It is composed of mono to heptachlorinated homologs. Pdf complete pcb congener distributions for 17 aroclor mixtures. Analysis of the commercial feed used for this study revealed contamination with congeners specific for aroclor 1248, present in the parts per billion range. 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. Development of advisory levels for polychlorinated. Alteration of aroclor 1248 in foundry waste by volatilization. The concentration in the sample is calculated using the sample weight or volume and the extract volume. 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. Congenerbased aroclor quantification and speciation techniques. Production, importexport, use, and disposal chemical company produced aroclors 1221, 1232, 1242, 1248, 1254, 1260, 1262, and 1268. Refer to chapter one and the manufacturers instructions for. Soil, water and air jim occhhialini jim okun patricia mcisaac.
Description, aroclor 1248 is a commercial mixture of pcbs with an average chlorine. Identification and quantitation of pcb aroclor mixtures in a single run using the agilent 7000b triple quadrupole gcms authors dale r. Aroclor 1248, the aroclor used onsite and recovered from the floor inside the foundry r2 0. 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. Acute ingestion of transformer oil may cause abdominal pain, nausea, and vomiting. 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. 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.
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. Acute exposure of liquid or vapor may cause irritation. A comparison of the strengths, weaknesses, and proper use of two alternative approaches. Analyzing pcbs in source materials and environmental media. Liver of rats that received aroclor 1254 on either day 7 or on day 28 contained in increased level of gammaglutamyltranspeptidase.
Cas number iupac name type 36363 polychlorinated biphenyl pcb category. Aroclors 1016 and 1242 have similar capillary gas chromatography gc. Note that the progression of weathering resulted in altering aroclor 1242 to resemble standard aroclor 1248. 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. This light yellow viscous liquid is a particularly highly chlorinated pcb mixture which, by definition, contains 54% chlorine by weight. Dale walker agilent gcms applications engineer t427 vs ar1248 standard. Walker and fred feyerherm agilent technologies, inc. Program and regulatory information about this substance, including links to epa applicationssystems, statuesregulations, or other sources that track or regulate this substance. Pcbs made in the united states were marketed under the trade name aroclor and most are identified by a fourdigit numbering code in which the first two digits indicate that the parent molecule is a biphenyl and for the 1200 series aroclors the last two digits indicate the chlorine content by weight. Dale published november 2007 to be presented a1 wm 2008 phoenix wm symposia, inc. Aroclor 1254 produced no harmful effects regarding growth or mortality, but did produce enlarged livers with microscopic evidence of hepatic cellular injury.
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