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ASTM C1475-00

Historical Revision

Standard Guide for Determination of Neptunium-237 in Soil

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1.1 This guide covers the detemination of neptunium-237 in soil by means of radiochemical separations and alpha spectrometry. This guide provides options in the selection of sample preparation, separation, and measurement. Although neptunium-237 is not a component of global fallout, it is a product of production reactors and spent fuel processing. This guide is designed for analysis of ten grams of soil previously collected and treated in accordance with Practices C998 and C999. Larger-size samples of environmental soil may also be analyzed, as long as the concentrations of interferences such as uranium and thorium are at or near environmental concentrations. Depending on the choice of a sample dissolution method, all chemical forms of neptunium may not be completely solubilized. This guide should allow the determination of neptunium-237 concentrations from sub becquerel per gram levels to applicable standards depending on count time, sample size, detector efficiency, background, and tracer yield.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of limitations prior to use. Specific precautionary statements are given in Section 8.


SDO ASTM: ASTM International
Document Number C1475
Publication Date June 10, 2000
Language en - English
Page Count 4
Revision Level 00
Supercedes
Committee C26.05
Publish Date Document Id Type View
June 1, 2017 C1475-17 Revision
June 1, 2005 C1475-05 Revision
June 10, 2000 C1475-00 Revision
June 1, 2010 C1475-05R10E01 Reaffirmation