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RECORD NUMBER: 37 OF 176

OLS Field Name OLS Field Data
Main Title Determination of pesticides and PCBs in industrial and municipal wastewaters /
Author Millar, John D. ; Thomas, Richard E. ; Johnson, Donald E.
Other Authors
Author Title of a Work
Thomas, R. E.
Johnson, Donald E.
CORP Author Southwest Research Inst., San Antonio, TX.;Environmental Monitoring and Support Lab., Cincinnati, OH.
Publisher U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory : Center for Environmental Research Information [distributor],
Year Published 1982
Report Number EPA-600/4-82-023; EPA-68-03-2606
Stock Number PB82-214222
Subjects Pesticides--Measurement. ; Polychlorinated biphenyls--Measurement. ; Sewage--Analysis. ; Gas chromatography. ; Abwasseranalyse. ; Pestizid.
Additional Subjects Pesticides ; Water analysis ; Chlorine organic compounds ; Chemical analysis ; Gas chromatography ; Sewage ; Industrial wastes ; Solvent extractions ; Water pollution detection ; Polychlorinated biphenyls
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB82-214222 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation vii, 212 pages ; 28 cm
Abstract
Steps in the procedure for the analysis of 25 chlorinated pesticides and polychlorinated biphenyls were studied. Two gas chromatographic columns and two detectors (electron capture and Hall electrolytic conductivity) were evaluated. Extractions were performed with two solvents (dichloromethane and 15 percent dichloromethane in hexane) at 3 pH's to determine extraction efficiencies. The effects of storage for 7 days, in the presence of residual chlorine, at two temperatures were determined. Florisil and alumina were compared as adsorbents for the cleanup of extracts. Recoveries of the substances from clean water and wastewater were measured, and assessments of accuracy and precision were made. The method is satisfactory for the analysis of clean waters and wastewaters having a relatively low background of interferences. However, it does not work well against medium to high levels of background interferences produced by substances that are electron capture sensitive, especially halogenated ones. Use of the Hall detector is indicated when nonhalogenated electron capture sensitive interferences are a problem, even though some loss in sensitivity will occur. When halogenated interferences are overwhelming, altered gas chromatography conditions and columns, such as temperature programming and columns which produce better resolution than the ones studied in this work, will be required.
Notes
"April 1982." Microfiche.