Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Test Procedure for Gross Alpha Particle Activity in Drinking Water: Interlaboratory Collaborative Study.
Author Whittaker, E. L. ;
CORP Author Lockheed Engineering and Management Services Co., Inc., Las Vegas, NV.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Year Published 1986
Report Number EPA-68-03-3249; EPA/600/4-86/027;
Stock Number PB86-236957
Additional Subjects Radioactivity ; Standards ; Drinking water ; Alpha particles ; Radioassay ; Counting techniques ; Thorium 230 ; Radium 226
Library Call Number Additional Info Location Last
NTIS  PB86-236957 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 64p
Gross alpha activity values were calculated with four different alpha emitting radionuclide standard counting efficiencies to see which standard was best for gross alpha activity determinations. Thorium-230, a pure alpha emitter, appeared to be the best standard for gross alpha counting efficiency. A secondary purpose in the study was to see how well the Ra-226 concentration of a drinking water sample could be estimated from an early gross alpha count subtracted from a late gross alpha count and calculated from the equation provided in the test procedure. The method for gross alpha particle concentration measurement eliminates the dissolved solids interference problem (which is a significant problem for the EPA approved method) and provides for greater sensitivity by allowing for the use of much larger samples in the analysis.