PCB congener Articles
-
Congener-specific analysis of polychlorinated biphenyl in human blood from Japanese
Polychlorinated biphenyl (PCB) congeners were analyzed by high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS) of whole blood samples taken from 24 healthy adult Japanese volunteers (12 males and 12 females, age range 25–46 years). On average, 95 PCB congeners were detected in whole blood samples. The mean of total PCB concentration in whole blood was 771.9 pg g–1 ...
-
Age‐related polychlorinated biphenyl dynamics in immature bull sharks (Carcharhinus leucas)
Polychlorinated biphenyls (PCBs) were quantified in liver tissues of bull sharks (Carcharhinus leucas) ranging in age from 3 yr. Summed values of PCBs (ΣPCBs) ranged from 310 ng/g to 22 070 ng/g (lipid wt) across age classes with ΣPCB concentrations for the youngest sharks in the present study (3‐yr‐old sharks, highlighting the extent of exposure of this young life stage to this class of ...
-
Polychlorinated biphenyls in urban lake sediments from Wuhan, Central China: occurrence, composition, and Sedimentary record
Nine surface sediments and a dated sediment core collected from urban lakes in Wuhan, Central China, were analyzed to investigate the concentrations, occurrence, composition, and depositional fluxes of polychlorinated biphenyls (PCBs). The concentrations of {Sigma}PCB (the sum of 39 congeners) in surface sediments ranged from 0.90 to 46.14 ng g–1 dry weight. Only in Longyang Lake and Nantaizi ...
-
Polychlorinated biphenyl congener distributions in burbot: Evidence for a latitude effect
We compared the distributions of the congeners of polychlorinated biphenyls (PCBs) detected in whole‐body samples of burbot (Lota lota) from Great Slave Lake and Lake Erie. Total PCB concentrations in Great Slave Lake burbot were about 1/60 of the concentrations in Lake Erie burbot. Burbot from Great Slave Lake contained a higher proportion of lower‐chlorinated (2‐6 chlorines) congeners than ...
-
Characteristics, distribution and sources of polychlorinated biphenyls (PCBs) in coastal sediments from the heavily industrialized area of Asalouyeh, Iran
In this research, the levels of polychlorinated biphenyls (PCBs) were investigated in the marine sediments of Asaluyeh harbor, in the Persian Gulf. The samples were taken from industrial, semi-industrial and urban regions. The mean concentration levels of total (Σ) 18 detected PCBs were 514.32, 144.67 and 31.6 pg/g dw for the industrial, semi-industrial and urban sampling stations, ...
-
Abundances, Depositional Fluxes, and Homologue Patterns of Polychlorinated Biphenyls in Dated Sediment Cores from the Pearl River Delta, China
Despite the recent efforts to investigate the distribution and fate of persistent organic pollutants in the tropical and subtropical regions of Asia, very little was known about the temporal change of polychlorinated biphenyls (PCBs) in the environmental ecosystem of China. In this study, three dated sediment cores collected from the Pearl River Delta of southern China were analyzed for a ...
-
Contaminants in wildlife utilising confined disposal facilities
Voles, shrews and aquatic plants from the Thunder Bay Confined Disposal Facility (CDF) and hatchery-reared ducks, released and recaptured four and 10 weeks after release, were analysed for heavy metals and polychlorinated biphenyls (PCBs). Metal concentrations in duck livers were comparable to our control site values and other reported studies. Metal concentrations in voles and shrews were ...
-
Polychlorinated biphenyls and their hydroxylated metabolites in wild fish from Wheatley Harbour Area of Concern, Ontario, Canada
Whole‐body polychlorinated biphenyls (ΣPCBs) and plasma hydroxylated PCBs (OH‐PCBs) concentrations were determined in brown bullhead (Ameiurus nebulosus) from Wheatley Harbour, Ontario, Canada. Elevated ΣPCBs in Wheatley Harbour are suspected to have originated from industrial waste disposal and/or discharges from nearby fish processing through discarding of fish remains. Mean ΣPCB ...
-
Evaluating cost when selecting performance reference compounds (PRCs) for the environmental deployment of polyethylene passive samplers
A challenge in environmental passive sampling is determining when equilibrium is achieved between the sampler, target contaminants, and environmental phases. A common approach is the use of performance reference compounds (PRCs) to estimate target contaminant sampling rates and indicate degree of sampler equilibrium. One logistical issue associated with using PRCs is their sometimes exorbitant ...
-
Analysis of Polychlorinated Biphenyls in Fish Oil Using Supelclean EZ-POP NP, Silica Gel SPE, and an SLB-5ms GC Column
Polychlorinated biphenyls (PCBs) were once widely used in many industrial and commercial applications such as insulating fluids, dielectrics, and lubricants. This included their extensive use in electrical transformers. PCB use has been banned in many countries, and the Stockholm Convention currently prohibits their production and use1. However, PCBs may still be released into the environment ...
-
Contaminant exposure of birds nesting in Green Bay, Wisconsin
In earlier studies, elevated polychlorinated biphenyl (PCB) and p,p'‐dichlorodiphenyldichloroethylene (DDE) concentrations were reported in double‐crested cormorant (Phalacrocorax auritus) eggs and tree swallow (Tachycineta bicolor) eggs and nestlings collected from lower Green Bay in 1994 and 1995 and black‐crowned night‐heron (Nycticorax nycticorax) eggs collected in 1991. Comparable samples ...
-
PCB profiles in ringed seals (Pusa hispida) reveal historical contamination by a military radar station in Labrador, Canada
Significant amounts of soil contaminated with polychlorinated biphenyls (PCBs) were discovered at a military radar station in Saglek Bay, Labrador (Canada) in 1996, and subsequent work found elevated PCB concentrations in local marine sediments, the benthic‐associated food web and in some ringed seals (Pusa hispida). The benthic‐associated food web clearly reflected local PCB contamination, ...
-
Assessing ongoing sources of dissolved‐phase polychlorinated biphenyls in a contaminated stream
Few studies assess the potential of ongoing sources of “fresh” polychlorinated biphenyls (PCBs) to aquatic systems when direct discharge to the environment has been eliminated. In the present study, the authors used single‐layered, low‐density polyethylene samplers (PEs) to measure total PCB concentrations, congener profiles, and enantiomeric fractions (EFs) in a contaminated stream and to ...
-
Environmental contaminants and chromosomal damage associated with beak deformities in a resident North American passerine
A large cluster of beak abnormalities among black‐capped chickadees (Poecile atricapillus) in Alaska raised concern about underlying environmental factors in this region. We analyzed metals and trace elements, organochlorine (OC) pesticides, polychlorinated biphenyls (PCBs), and polychlorinated dibenzo‐dioxins and polychlorinated dibenzofurans (PCDD‐Fs) in adults, nestlings, and eggs of the ...
-
Towards Ecosystem Based Sediment Quality Guidelines for PCB
To investigate whether Sediment Quality Guidelines (SQG) for PCBs in Canada and British Columbia achieve their objective of protecting ecosystems, we measured and compiled concentrations of PCB congeners in sediments, bivalves, crustaceans, fish and marine mammals from three areas off the pacific coast of British Columbia, Canada. The concentration data showed that while PCB concentrations in ...
-
PCB concentrations in shrimp from major import markets and the United States
Currently, environmental studies describing levels of polychlorinated biphenyls (PCBs) in imported shrimp are limited, particularly studies of aquaculture shrimp. In the present study, we measured concentrations of the 209 PCB congeners in 84 uncooked, warm‐water shrimp samples from the United States and 14 other countries in three continents. Total PCB and dioxin‐like PCB (DL‐PCB) levels were ...
-
Proof of concept for the use of macroinvertebrates as indicators of PCB contamination in Lake Hartwell
The U.S. Environmental Protection Agency (EPA) develops methods and tools for evaluating risk management strategies for sediments contaminated with polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and other legacy pollutants. Monitored natural recovery (MNR) is a risk management alternative that relies on existing physical, chemical, and biological processes to ...
-
The effects of an environmentally relevant 58 congener polychlorinated biphenyl (PCB) mixture on cardiac development in the chick embryo
Chicken (Gallus domesticus) embryonic exposure in ovo to a 58 congener PCB mixture resulted in teratogenic heart defects in chick embryos at critical heart developmental stages Hamburger Hamiltion (HH) 10, 16, and 20. The 58 congener mixture contained relative proportions of primary congeners measured in belted sandpiper (Megaceryle alcyon) and spotted sandpiper (Actitis macularia) eggs ...
-
Hepatic EROD induction in the common kingfisher from an e‐waste recycling site
The health effects of exposure to electronic waste (e‐waste) derived pollutants are an important issue. We explored the association between the hepatic levels of e‐waste derived halogenated contaminants, including polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and polybrominated biphenyls (PBBs), and hepatic ethoxyresorufin‐O‐deethylase (EROD) activity of the common ...
-
Differentiating Polychlorinated Biphenyls (PCB’s) by GC / FID / ECD
The analytical chemistry of PCB’s is rigorous, demanding the highest quality in sample preparation and analytical technique. Insufficient sample extraction and inappropriate methods of sample clean-up are the most common sources of error in PCB analysis, which causes significant interference in the chromatography. However, even in relatively clean samples the problem remains to ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you