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Significance and Use
4.1 This practice is applicable when small amounts of 241Am are present in plutonium samples (see Test Methods C758 and C759). An example is the determination of 241Am in a 238Pu sample. The high specific activity of 238Pu presents a safety hazard that precludes its presence in a counting facility. Therefore, it is necessary to remove the 238Pu prior to the determination of 241Am.
4.2 When a plutonium solution contains fission or activation products, this practice does not separate all radionuclides that interfere in the determination of 241Am, such as the rare earths.
1.1 This practice describes the use of an ion exchange technique to separate plutonium from solutions containing low concentrations of americium prior to measurement of the 241Am by gamma counting.
1.2 This practice covers the removal of plutonium, but not all the other radioactive isotopes that may interfere in the determination of 241Am.
1.3 This practice can be used when 241Am is to be determined in samples in which the plutonium is in the form of metal, oxide, or other solid provided that the solid is appropriately sampled and dissolved (See Test Methods C758, C759, and C1168).
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C758 Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Plutonium Metal
C759 Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Plutonium Nitrate Solutions
C1168 Practice for Preparation and Dissolution of Plutonium Materials for Analysis
C1268 Test Method for Quantitative Determination of Americium 241 in Plutonium by Gamma-Ray Spectrometry
D1193 Specification for Reagent Water
ICS Number Code 71.060.10 (Chemical elements)
UNSPSC Code 12141703(Americium Am); 12141735(Plutonium Pu)