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RECORD NUMBER: 9 OF 10

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
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB86-236957 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 64p
Abstract 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.
Supplementary Notes Sponsored by Environmental Monitoring Systems Lab., Las Vegas, NV.
PUB Date Free Form Aug 86
Category Codes 18H; 13B; 77G; 48B
NTIS Prices PC A04/MF A01
Primary Description 600/07
Document Type NT
Cataloging Source NTIS/MT
Control Number 631011642
Origin NTIS
Type CAT