1.1 本试验方法包括钚（Pu）材料中25种元素的测定。将Pu溶解在酸中，通过离子交换分离将Pu基质与目标杂质分离，并通过电感耦合等离子体原子发射光谱法（ICP-AES）测定杂质的浓度。 1.2 该试验方法专门用于测定8M HNO中的杂质 3. 解决。其他钚材料中的杂质，包括氧化钚样品，如果适当溶解，可以进行测定（见实施规程 C1168 )并转化为8M HNO 3. 解决。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值是数学转换，仅供参考，不被视为标准值。此外，摩尔浓度和汞厘米的非国际单位制单位应视为标准单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。第节中给出了一些具体的危险说明 9 关于危险。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 该试验方法可用于硝酸盐溶液中的钚基质。 5.2 该测试方法已针对测试方法中列出的所有元素进行了验证 C757 除了硫（S）和钽（Ta）。 5.3 该测试方法已针对中测量的所有阳离子元素进行了验证 表1 磷（P）需要真空或惰性气体吹扫的光路仪器。

1.1 This test method covers the determination of 25 elements in plutonium (Pu) materials. The Pu is dissolved in acid, the Pu matrix is separated from the target impurities by an ion exchange separation, and the concentrations of the impurities are determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). 1.2 This test method is specific for the determination of impurities in 8 M HNO 3 solutions. Impurities in other plutonium materials, including plutonium oxide samples, may be determined if they are appropriately dissolved (see Practice C1168 ) and converted to 8 M HNO 3 solutions. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions that are provided for information only and are not considered standard. Additionally, the non-SI units of molarity and centimeters of mercury are to be regarded as standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section 9 on Hazards. 1.5 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. ====== Significance And Use ====== 5.1 This test method can be used on plutonium matrices in nitrate solutions. 5.2 This test method has been validated for all elements listed in Test Methods C757 except sulfur (S) and tantalum (Ta). 5.3 This test method has been validated for all of the cation elements measured in Table 1 . Phosphorus (P) requires a vacuum or an inert gas purged optical path instrument.