1.1 本规程涵盖了在杂质测量之前使用萃取色谱柱方法从液体或消化氧化物或金属中去除钚或铀或两者的说明。杂质的定量可以通过电感耦合等离子体质谱（ICP-MS）、电感耦合等离子体原子发射光谱法（ICP-AES）或原子吸收光谱法（AAS）等技术进行 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 在通过各种技术进行杂质分析之前，该方法可用于分离铀或钚或两者。量化前去除铀和钚可以通过最小化使用ICP技术时铀或钚引起的信号抑制来提高检测限。通过去除基质，可获得约1-10 ppm（PPB）的检测限。此外，去除铀和钚可允许在非金属表面上进行杂质分析- 手套箱封闭式仪表。 5.2 其他测试方法可用于测定铀或钚中的杂质。试验方法 C1517 能够通过直流电弧光谱法在约百万分之一到百万分之十（ppm）的检测水平下测定铀中的许多杂质。试验方法 C1287 能够通过ICP-MS在约100 ppb的检测水平下测定铀中的杂质。试验方法 C1432 提供了一种在ICP-AES分析杂质之前通过离子交换去除钚的替代技术。 5.3 该实践可用于证明符合核燃料规范，例如规范 C753 , C757 , C776 , C787 , C788 和 C996 .

1.1 This practice covers instructions for using an extraction chromatography column method for the removal of plutonium or uranium, or both, from liquid or digested oxides or metals prior to impurity measurements. Quantification of impurities can be made by techniques such as inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma atomic emission spectrometry (ICP-AES), or atomic absorption spectrometry (AAS.) 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. ====== Significance And Use ====== 5.1 This practice can be used to separate uranium or plutonium, or both, prior to the impurity analysis by various techniques. The removal of uranium and plutonium prior to quantification can improve the detection limits by minimizing the signal suppression caused by uranium or plutonium when using ICP techniques. Detection limits of ~1–10 part-per-billion (PPB) may be obtainable by matrix removal. Also, removal of the uranium and plutonium may allow the impurities analysis to be performed on a non-glove box enclosed instrument. 5.2 Other test methods exist to determine impurities in uranium or plutonium. Test Method C1517 is able to determine many impurities in uranium at detection levels of ~1–10 part-per-million (ppm) by DC-Arc Spectrometry. Test Method C1287 is able to determine impurities in uranium at detection levels of ~100 ppb by ICP-MS. Test Method C1432 provides an alternative technique to remove plutonium by ion exchange prior to analysis of the impurities by ICP-AES. 5.3 This practice can be used to demonstrate compliance with nuclear fuel specifications, for example, Specifications C753 , C757 , C776 , C787 , C788 , and C996 .