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ASTM C1637-21

Standard Test Method for Determination of Impurities in Plutonium Materials - Acid Digestion and Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS) Analysis

1.1This test method covers the determination of trace elements in plutonium (Pu) materials such as Pu metal, Pu oxides, and Pu/uranium (U) mixed oxides. The Pu sample is dissolved in acid, and the concentration of the trace impurities are determined by Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS).

1.2This test method is specific for the determination of trace impurities where the samples are dissolved and the oxidation state is adjusted to the Pu(IV) and, if applicable, the U(VI) state. It may be applied to other matrices; however, it is the responsibility of the user to evaluate the performance of other matrices.

1.3The use of a quadrupole ICP-MS or a high resolution ICP-MS (HR-ICP-MS) can be employed in all applications relevant to this test method. HR-ICP-MS is a better option in many cases since it can reduce or potentially eliminate interferences encountered in the following complex sample matrices.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


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