【国外标准】 Standard Test Method for The Radiochemical Determination of Americium-241 in Soil by Alpha Spectrometry

5.1 This test method provides the speed and high decontamination factors attainable with liquid-liquid extraction of the actinides and eliminates filtration techniques that are more time consuming.5.2 This test method provides a precise determination of americium in concentrations normally found in environmental samples.1.1 This test method covers the determination of 241Am in soil by means of chemical separations and alpha spectrometry. It is designed to analyze up to 10 g of soil or other sample matrices that contain up to 30 mg of combined rare earths. This test method allows the determination of 241Am concentrations from ambient levels to applicable standards.1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This 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.