1.1 本试验方法包括使用电感耦合等离子体质谱法（ICP-MS）在不进行基质分离的情况下测定二氧化铀样品和核级铀化合物及溶液中的67种元素。表中列出了这些元素 1、这些元素也可以在六水硝酸铀酰（UNH）、六氟化铀（UF）中测定 6. )，八氧化三铀（U 3. O 8. )和三氧化铀（UO 3. )如果将这些化合物处理并转化为相同浓度的铀溶液。 1.2 元素硼、钠、硅、磷、钾、钙和铁可以使用不同的技术进行测定。分析员的仪器将决定选择哪种程序进行分析。 1.3 锝-99的测试方法见 附件A1 . 1.4 以国际单位制表示的数值应视为标准值。 1.5 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。 警告 -ICP-MS是射频诱导等离子体的强紫外线辐射源。在正常操作下，仪器提供射频辐射和紫外线辐射防护。 1.6 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 本试验方法能够测量下列元件: 表1 ，其中一些是规范要求的 C753 , C776 , C787 , C788 , C967 和 C996 .

1.1 This test method covers the determination of 67 elements in uranium dioxide samples and nuclear grade uranium compounds and solutions without matrix separation by inductively coupled plasma mass spectrometry (ICP-MS). The elements are listed in Table 1. These elements can also be determined in uranyl nitrate hexahydrate (UNH), uranium hexafluoride (UF 6 ), triuranium octoxide (U 3 O 8 ) and uranium trioxide (UO 3 ) if these compounds are treated and converted to the same uranium concentration solution. 1.2 The elements boron, sodium, silicon, phosphorus, potassium, calcium and iron can be determined using different techniques. The analyst's instrumentation will determine which procedure is chosen for the analysis. 1.3 The test method for technetium-99 is given in Annex A1 . 1.4 The values stated in SI units are to be regarded as standard. 1.5 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. Warning —The ICP-MS is a source of intense ultra-violet radiation from the radio frequency induced plasma. Protection from radio frequency radiation and UV radiation is provided by the instrument under normal operation. 1.6 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 is capable of measuring the elements listed in Table 1 , some of which are required by Specifications C753 , C776 , C787 , C788 , C967 and C996 .