polychlorinated biphenyl

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Related to Aroclors: Pcbs

pol·y·chlo·rin·at·ed biphenyl


polychlorinated biphenyl

(Elements & Compounds) any of a group of compounds in which chlorine atoms replace the hydrogen atoms in biphenyl: used in industry in electrical insulators and in the manufacture of plastics; a toxic pollutant that can become concentrated in animal tissue. Abbreviation: PCB

polychlorinated biphenyl (PCB)

n bifenilo policlorado (BPC), policlorobifenilo
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Aroclors are a mixture of hundreds of different congeners requiring identification by the analyst visually comparing the chromatography of the unknown with the chromatography of the standards.
Rodents treated with PCBs and commercial Aroclors exhibited a wide range of estrogenic effects including precocious puberty increases in the ovarian wet weight and water imbibition [22].
The profiles of sites 3, 4 and 5 are matched with Aroclor 1248 profile with some percent from heavier Aroclors like 1254 and 1260, while the profil es of sites 2 and 6 are similar to Aroclor 1254 profile with some percent of lighter Aroclor 1248 (Fig.
Each specific Aroclor contained mixtures of some of the 209 congeners, with chlorine contents of the different Aroclors ranging from 21% to 68%.
b) Average values for 30-m and 60-m sites sampled in 1985 and 1990 for the SCCWRP Reference Site Surveys (SCCWRP, 1987, 1992); total DDT is the sum of five isomers, total PCB is sum of two Aroclors, and HPAH represents sum of 30 LPAH and HPAH.
A new reference material (RM), RM 8504, has been prepared for use as a diluent oil with Aroclors in transformer oil Standard Reference Materials (SRMs) 3075 to 3080 and SRM 3090 when developing and validating methods for the determination of polychlorinated biphenyls (PCBs) as Aroclors in transformer oil or similar matrices.
Non-, mono-, and di-ochlorobiphenyl concentrations and their toxic equivalents to 2,3,7,8-tetrachlorodibenzo[p]dioxin in Aroclors and digestive glands from American lobster (Homarus americanus) captured in Atlantic Canada.
These NJDEP surveys focused on bioaccumulation of isomers exclusively found in Aroclors 1248, 1254, and 1260.
In the United States, Monsanto Company has manufactured different mixtures of PCBs, the most widely used mixtures being Aroclors 1016, 1242, 1248, 1254, and 1260.
Aroclors are essentially different chlorine concentration fractions of PCBs that have different properties.
Monsanto produced PCBs under the name Aroclors beginning in 1930.
2010) developed a PCB mixture resembling the average congener profile in Chicago air by combining Aroclors 1242 and 1254.