Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Determination of Trace Amounts of Selenium in Corn, Lettuce, Potatoes, Soybeans, and Wheat by Hydride Generation/Condensation and Flame Atomic Absorption Spectrometry.
Author Harn, Mark H. ; Kuennen, Roy W. ; Caruso, Joseph A. ; Fricke, Fred L. ;
CORP Author Cincinnati Univ., OH. Dept. of Chemistry.;Health Effects Research Lab., Research Triangle Park, OH.
Year Published 1981
Report Number EPA-600/J-81-608;
Stock Number PB83-163428
Additional Subjects Selenium ; Spectroscopy ; Corn ; Lettuce ; Potatoes ; Soybeans ; Wheat ; Concentration(Composition) ; Reprints ; Trace amounts ; Toxic substances
Library Call Number Additional Info Location Last
NTIS  PB83-163428 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 6p
Because of the nutritional and toxicological significance of low selenium concentrations in agricultural crops, a procedure utilizing wet digestion followed by hydride generation/condensation-flame atomic absorption was developed for the routine analysis of selenium in different varieties of soybeans, wheat, potatoes, lettuce, and sweet corn. The lowest quantifiable level, based on 2 g of sample, is 1 ng/g (dry weight) for all crop types studied. The precision for the total analysis is 3.7% relative standard deviation (RSD) at a mean concentration of 100 ng/g and 13% RSD at a mean concentration of 1 ng/g. Sample recoveries, precision studies, and analyses of NBS reference materials demonstrate the reliability and accuracy of this technique. A summary of results for 830 crop samples is reported.