Record Display for the EPA National Library Catalog
RECORD NUMBER: 11 OF 20
|OLS Field Name||OLS Field Data|
|Main Title||GC/MS methodology for priority organics in municipal wastewater treatment /|
|Author||Bishop, Dolloff F.|
|CORP Author||Municipal Environmental Research Lab., Cincinnati, OH.|
|Publisher||U.S. Environmental Protection Agency, Research and Development, Municipal Environmental Research Laboratory : Center for Environmental Research Information [distributor],|
|Subjects||Water--Purification--Organic compounds removal. ; Organic water pollutants--Measurement.|
|Additional Subjects||Sewage ; Water analysis ; Organic compounds ; Waste disposal ; Gas chromatography ; Mass spectroscopy ; Samples ; Sludges ; Pesticides ; Chemical analysis ; Separation ; Industrial wastes ; Extraction ; Water pollution detection ; Toxic substances ; State of the art|
|Collation||vii, 43 pages : charts ; 28 cm|
A state-of-the-art review is presented on the current GC/MS methodology for the analysis of priority toxic organics in municipal wastewater treatment. The review summarizes both recent published and unpublished literature on GC/MS methods for analysis of toxic organics in municipal wastewaters and sludges. The EPA has developed methodology for the measurement of these priority toxic organics based on GC/MS technology. Succinctly, the methodology separates the purgeable priority organics from the environmental sample by purging with inert gas and trapping of the organics on a Tenax and silica gel trap. The organics are then desorbed, identified and quantitated with packed column GC/MS analysis. The methodology separates the extractable organics by extracting with methylene chloride, first at pH II and then at pH 2, and then identifies and quantitates the organics in the base/neutral and acid extracts by packed column GC/MS analysis. Municipal wastewaters and sludges contain a wide variety of extractable organics which can interfere in the GC/MS analysis. Thus, the extracts may require clean-up or organics separation before the GC/MS analyses. Principal classes of organic interferences include lipids, fatty acids and saturated hydrocarbons. The approaches to separate the desirable priority organics from the interferences include acid/base separation, molecular size separation and polarity separation.
"November 1980." Includes bibliographical references. "EPA 600/2-80-196." "PB81-1278137." Microfiche.