ASTM C1000.pdf

Designation: C 1000 – 05

Standard Test Method for

Radiochemical Determination of Uranium Isotopes in Soil by

Alpha Spectrometry

1

This standard is issued under the fixed designation C 1000; the number immediately following the designation indicates the year of

original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A

superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

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.

1.3 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.

10.

2. Referenced Documents

2.1 ASTM Standards:

C 998 Practice for Sampling Surface Soil for Radionuclides

C 999 Practice for Soil Sample Preparation for the Deter-

C 1163 Test Method for Mounting Actinides for Alpha

C 1284 Practice for Electrodeposition of the Actinides for

5.2 Since uranium-232 is added as a tracer, it can not be

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.

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