Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Water pesticides no. 1 report of a study conducted by Analytical Reference Service / {microform} : study number 24 ;
Author Lishka, Raymond J.
CORP Author Robert A. Taft Sanitary Engineering Center, Cincinnati, Ohio.
Publisher Robert A. Taft Sanitation Engineering Center,
Year Published 1966
Report Number PHS PUB 999 WP 39; PHS-Pub-999-WP-39
Stock Number PB-173 984
OCLC Number 54368186
Subjects Pesticides ; Water--Analysis
Additional Subjects ( Insecticides ; Selection) ; ( Pesticides ; Gas chromatography) ; Separation ; Solvent extraction ; Statistical analysis ; Detection ; Water ; Solutions ; Sampling ; Chemical analysis
Library Call Number Additional Info Location Last
NTIS  PB-173 984 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 xi, 64 p. : ill. ; 23 cm.
In this study, two solutions of ethyl acetate containing different mixtures of lindane, heptachlor epoxide, DDE, and dieldrin were analyzed, both before and after dilution with water, by 31 participating laboratories. ONE PARTICIPANT USED PAPER CHROMATOGRAPHY, AND THE REST USED GAS CHROMATOGRAPHY; FOUR OF THE LATTER EMPLOYED THE MICROCOULOMETRIC DETECTOR, AND THE REST USED THE ELECTRON CAPTURE DETECTOR. Best resus were obtained with a mixed column packing containing both polar and nonpolar materials. Satisfactory results were also obtained with a single-component column when a prior separation of the pesticides by passage through a florisil or alumina chromatographic column was made before injection on the gas chromatograph. The newer model C-200 Dohrmann microcoulometer produced satisfactory results at the concentrations present in this sample. Failure to correct adequately for incomplete recovery of pesticide in the extraction procedure produced low results in the diluted sample.