Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Application of the Hall Detector and a Surface-Bonded Carbowax 20M Column to Analysis of Organochlorine Pesticides in Human Biological Samples.
Author Crist, Howard L. ; Moseman, Robert F. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Analytical Chemistry Branch.
Year Published 1978
Report Number EPA/600/9-78/104;
Stock Number PB-294 862
Additional Subjects Pesticides ; Biological extracts ; Chlorine organic compounds ; Gas chromatography ; Laboratory equipment ; Detectors ; Samples ; Conductivity ; Performance evaluation ; Humans ; Concentration(Composition) ; Lipids ; Hall detectors ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-294 862 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 12p
An evaluation of a gas chromatographic electrolytic conductivity detector system (Hall detector) was conducted for the determination and confirmation of selected organochlorine pesticides at sub-ppm concentration levels in human biological extracts. The sample extracts were also analyzed with electron capture gas chromatography for comparison purposes. The linear regression lines for both sets of data were calculated by the least squares method. A high degree of correlation between the data sets was found. Also evaluated as part of the electrolytic conductivity detector system was a column with Carbowax 20M bonded to the surface of the support. The effect of repeated injections of extracts with a high content of lipids on the performance of the Hall detector and column was investigated. Gel-permeation chromatography was found to be valuable as a technique for additional clean-up of certain extracts having an adverse effect on the performance of the Hall detector due to excessive lipid material.