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  • ASTM
    D7939-15 Standard Test Method for Rapid Radiochemical Determination of Americium-241 in Water
    Edition: 2015
    $103.58
    Unlimited Users per year

Description of ASTM-D7939 2015

ASTM D7939-15

Withdrawn Standard: Standard Test Method for Rapid Radiochemical Determination of Americium-241 in Water (Withdrawn 2024)




ASTM D7939

Scope

1.1 This test method is specifically for Americium-241 (241Am) in drinking water and other aqueous samples. However, if any isotopes of curium are present in the sample, they will be carried with americium during the analytical separation process and will be observed in the final alpha spectrum. The presence of 243Am in the water sample will bias the results obtained by this test method.

1.2 This test method is applicable to samples in which radioactive contamination is from either known or unknown origins. If any filtration of the sample is performed before starting the analysis, those solids should be analyzed separately. The results from the analysis of these solids should be reported separately (as a suspended activity concentration for the water volume filtered) but identified with the filtrate results.

1.3 This test method is applicable to the determination of soluble 241Am. This test method is not applicable to the determination of 241Am in highly insoluble particulate matter possibly present in water samples contaminated as a result of a radiological dispersal device (RDD) event.

1.4 This test method uses rapid radiochemical separation techniques for determining americium in water samples following a radiological or nuclear incident. Although, with this test method, concentrations of 241Am on the same order of magnitude as methods used for the Safe Drinking Water Act (SDWA) can be detected, this test method is not a substitute for SDWA-approved methods for 241Am.

1.5 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

1.6 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.


Keywords

alpha spectrometry; americium-241; curium; extraction chromatography; radioactivity; radiochemistry;


ICS Code

ICS Number Code 13.060.60 (Examination of water for physical properties)


DOI: 10.1520/D7939-15

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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