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Title: GENERATING THE RIGHT PCB DATA DETERMINATION OF AROCLORS VERSUS PCB CONGENERS

Abstract

Polychlorinated biphenyls (PCBs) are a major environmental concern due to their ubiquity and tendency to bio-accumulate. as well as their persistence and toxicity. As the cleanup of waste and contaminated soil progresses at U.S. Department of Energy (DOE) sites, the costs for accurate PCB data are increasing. PCBs are actually a broad name for a group of 209 individual compounds known as congeners. PCBs were originally produced in the United States as specific mixtures of congeners known as Aroclors'. PCBs can be analyzed and quantified either as Aroclor mixtures or as individual congeners. Aroclor analysis, which is the more common analytical method applied to PCBs. has been in use for decades, and in general, most cleanup regulations are based on total PCB concentrations using Aroclor analyses. Congener analysis is relatively new to environmental cleanup and restoration due to both technical issues and associated cost. The benefits of congener analysis are that it allows a more direct analysis of the risk of the PCBs. The World Health Organization (WHO) has identified twelve specific congeners as dioxin-like with toxicity ranging from 0.00003 to 0.1 times the standard 2,3,7.8-Tetrachlorodibenzo-p-dioxin (2.3.7.8-TCDD) toxicity. This paper defines Aroclors and congeners and compares the current application andmore » usefulness of the two analytical methods for environmental restoration and cleanup. A strategy for the best use of the two methods to optimize overall characterization cost is presented. As part of the strategy. a method using the data from Aroclor analyses to calculate 2,3,7,8-TCDD toxicity equivalent concentrations is also presented.« less

Authors:
;
Publication Date:
Research Org.:
Hanford Site (HNF), Richland, WA
Sponsoring Org.:
USDOE - Office of Environmental Management (EM)
OSTI Identifier:
920178
Report Number(s):
HNF-34789-FP Rev 0
TRN: US200825%%438
DOE Contract Number:
DE-AC06-96RL13200
Resource Type:
Conference
Resource Relation:
Conference: WASTE MANAGEMENT SYMPOSIUM 2008 (WM08) 02/24/2007 THRU 02/28/2008 PHOENIX ARIZONA
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; MIXTURES; POLYCHLORINATED BIPHENYLS; REGULATIONS; SOILS; TOXICITY; WASTE MANAGEMENT; WASTES; WHO

Citation Formats

NARQUIS CT, and PRIGNANO AL. GENERATING THE RIGHT PCB DATA DETERMINATION OF AROCLORS VERSUS PCB CONGENERS. United States: N. p., 2007. Web.
NARQUIS CT, & PRIGNANO AL. GENERATING THE RIGHT PCB DATA DETERMINATION OF AROCLORS VERSUS PCB CONGENERS. United States.
NARQUIS CT, and PRIGNANO AL. Wed . "GENERATING THE RIGHT PCB DATA DETERMINATION OF AROCLORS VERSUS PCB CONGENERS". United States. doi:. https://www.osti.gov/servlets/purl/920178.
@article{osti_920178,
title = {GENERATING THE RIGHT PCB DATA DETERMINATION OF AROCLORS VERSUS PCB CONGENERS},
author = {NARQUIS CT and PRIGNANO AL},
abstractNote = {Polychlorinated biphenyls (PCBs) are a major environmental concern due to their ubiquity and tendency to bio-accumulate. as well as their persistence and toxicity. As the cleanup of waste and contaminated soil progresses at U.S. Department of Energy (DOE) sites, the costs for accurate PCB data are increasing. PCBs are actually a broad name for a group of 209 individual compounds known as congeners. PCBs were originally produced in the United States as specific mixtures of congeners known as Aroclors'. PCBs can be analyzed and quantified either as Aroclor mixtures or as individual congeners. Aroclor analysis, which is the more common analytical method applied to PCBs. has been in use for decades, and in general, most cleanup regulations are based on total PCB concentrations using Aroclor analyses. Congener analysis is relatively new to environmental cleanup and restoration due to both technical issues and associated cost. The benefits of congener analysis are that it allows a more direct analysis of the risk of the PCBs. The World Health Organization (WHO) has identified twelve specific congeners as dioxin-like with toxicity ranging from 0.00003 to 0.1 times the standard 2,3,7.8-Tetrachlorodibenzo-p-dioxin (2.3.7.8-TCDD) toxicity. This paper defines Aroclors and congeners and compares the current application and usefulness of the two analytical methods for environmental restoration and cleanup. A strategy for the best use of the two methods to optimize overall characterization cost is presented. As part of the strategy. a method using the data from Aroclor analyses to calculate 2,3,7,8-TCDD toxicity equivalent concentrations is also presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Nov 21 00:00:00 EST 2007},
month = {Wed Nov 21 00:00:00 EST 2007}
}

Conference:
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  • Polychlorinated biphenyls (PCBs) are a major environmental concern due to their ubiquity and tendency to bio-accumulate, as well as their persistence and toxicity. As the cleanup of waste and contaminated soil progresses at U.S. Department of Energy (DOE) sites, the costs for accurate PCB data are increasing. PCBs are actually a broad name for a group of 209 individual compounds known as congeners. PCBs were originally produced in the United States as specific mixtures of congeners known as Aroclors. PCBs can be analyzed and quantified either as Aroclor mixtures or as individual congeners. Aroclor analysis, which is the more commonmore » analytical method applied to PCBs, has been in use for decades, and in general, most cleanup regulations are based on total PCB concentrations using Aroclor analyses. Congener analysis is relatively new to environmental cleanup and restoration due to both technical issues and associated cost. The benefits of congener analysis are that it allows a more direct analysis of the risk of the PCBs. The World Health Organization (WHO) has identified twelve specific congeners as dioxin-like with toxicity ranging from 0.00003 to 0.1 times the standard 2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) toxicity. This paper defines Aroclors and congeners and compares the current application and usefulness of the two analytical methods for environmental restoration and cleanup. A strategy for the best use of the two methods to optimize overall characterization cost is presented. As part of the strategy, a method using the data from Aroclor analyses to calculate 2,3,7,8-TCDD toxicity equivalent concentrations is also presented. (authors)« less
  • Sonication has been evaluated and compared with Soxhlet extraction and solvent steam distillation for extraction of polychlorinated biphenyls (PCBs) from sediments and soil. A gas chromatograph equipped with a Ni-63 electron-capture detector using a 5% phenyl methyl silicone fused silica capillary column was used to determine 68 PCB congeners. The influence loss of PCB during drying was found to be considerable. Recoveries of PCBs from three river sediments, a soil and a standard US EPA sediment have been determined for different solvent systems with the sonication procedure. PCB recovery as a function of sonication time was evaluated 3 minutes wasmore » the optimum sonication time. The higher recovery and precision were obtained with wet samples and using hexane-acetone (1:1) as solvent, and a 3 min. sonication period. The average MDL was 1 ng/g dry weight. Results utilizing GC/EC were compared with those obtained by GC/MS with one US Environmental Protection Agency (EPA) quality control sediment the sand, silt and clay fractions from a river sediments from Fort Miller, NY. Effects of aging on PCB congener extraction efficiency were investigated, less chlorinated PCB were more difficult to extract than more chlorinated PCB, mechanisms accounting for this phenomenon will be discussed.« less
  • A comprehensive screening and confirmatory method was developed for monitoring polychlorinated biphenyls (PCBs), both as Aroclors and as individual congeners. This approach incorporates extraction, extract cleanup, and analysis modules designed to match cost, time, and data quality requirements. Soxhlet, sonication, supercritical fluid, and accelerated solvent extractions were evaluated. Carbon chromatographic cleanup procedures were used for separation of congeners on the basis of ortho substitutions, which permitted calculation of toxicity equivalents. Individual congener determinations, congener total histograms, and peak comparison techniques for Aroclor identification were elaborated by using high and low resolution mass spectrometric data. A screening procedure based on immunoassaymore » using the Ohmicron PCB RaPID Assay{trademark} kit gave results comparable to those obtained by gas chromatography with electron capture detection in the range 0.40-230 ppm, when the appropriate Aroclor calibrator was used. 21 refs., 3 figs., 4 tabs.« less
  • A goal of the analytical chemistry program of the USEPA Characterization Research Division in Las Vegas is to develop a comprehensive method to address PCB screening and confirmatory needs. Supercritical and liquid solvent extractions, carbon chromatographic partitioning, immunoassay, gas chromatographic and mass spectrometric techniques are being applied. The result of this research is a method with options to meet a variety of detection limit, congener specificity, waste reduction, and identification requirements. Significant advances were made in the areas of waste reduction, identification and quantitation of toxic congeners, and Aroclor identification using high- and low-resolution mass spectrometric data. Specific mass monitoringmore » procedures will be discussed. Procedures will be presented for converting individual isomer and congener total area responses to quantitation based on Aroclor content. Notice: The US Environmental Protection Agency (EPA), through its Office of Research and Development (ORD), partially funded and collaborated in the research described in this abstract for a proposed poster. It does not necessarily reflect the views of the EPA or ORD.« less
  • Short communication.