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ASTM C 1000 Document Information:
Title
Standard Test Method for Radiochemical Determination of Uranium Isotopes in Soil by Alpha Spectrometry
ASTM International
Publication Date:
Jun 1, 2005
Scope:
This test method covers the determination of alpha-emitting uranium
isotopes in soil. This test
method describes one acceptable approach to the determination of
uranium isotopes in soil.(Footnote
2)
The test method is designed to analyze 10 g of soil; however, the
sample size may be varied to 50 g
depending on the activity level. This test method may not be able to
completely dissolve all forms
of uranium in the soil matrix. Studies have indicated that the use of
hydrofluoric acid to dissolve
soil has resulted in lower values than results using total dissolution
by fusion.
The lower limit of detection is dependent on count time, sample size,
detector efficiency,
background, and tracer yield. The chemical recovery averaged 78 % in a
single laboratory
evaluation, and 66 % in an interlaboratory collaborative study.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. A specific
precautionary statement is given in Section 10.
Footnote 2 - Casella, V. A., Bishop, C. T., and Glosby, A. A.,
"Radiometric Method for the
Determination of Uranium in Soil and Air," U.S. Environmental
Protection Agency, EPA-600/7-80-019,
Las Vegas, NV, February 1980; and in Practices D 3084 and D 3648.
Keywords:
- alpha spectrometry
- radiochemistry
- soil
- uranium
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