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Standard Guide for Determination of Neptunium-237 in Soil
Automaticky preložený názov:
Štandardné Príručka pre stanovenie neptúnium 237 v pôde
NORMA vydaná dňa 10.6.2000
Označenie normy: ASTM C1475-00
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.6.2000
Kód tovaru: NS-11433
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
alpha spectroscopy, americium 243, beta conuting, extraction chromatography, gamma-ray spectroscopy, neptunium-239, neptunium-237 determination, soil analysis, ICS Number Code 13.080.10 (Chemical characteristics of soil)
1. Scope | ||||||||||||||||||||||||||||||||
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. |
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2. Referenced Documents | ||||||||||||||||||||||||||||||||
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