1.1 本试验方法提供了确定二氧化钚（PuO）中水分总量（物理吸附和化学吸附水分子）的必要信息 2. )结合使用热重分析和质谱分析的样品。在PuO中水分含量最大的情况下进行分析时，该试验方法很有用 2. 样品已由相关方商定。例如，该方法可用于确定某些类型PuO的含水量 2. 包装符合DOE-STD-3013的要求 ( 1. ) , 2. “含钚材料的稳定、包装和储存”，当此类PuO 2. 符合本试验方法中给出的规范 ( 2. ) . 1.2 本试验方法适用于PuO 2. 具有以下特征的样品:钚质量分数 ≥ 83%（样品中的钚应接近化学计量PuO） 2. 根据钚的同位素组成，其约为88 wt%的钚，但可能含有几个重量百分比的杂质） ≤ 1 %. 1.3 测试的温度范围通常为室温，大于1000 °C.通常为PuO 2. 加热至1100°C。 1.4 本试验方法使用惰性气体环境（氩气、氮气或氦气）。 1.5 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。 1.6 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。 1.7 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 本试验方法旨在用于质量控制实验室，其中定量分析PuO上的吸附水分 2. 需要样品。 5.2 应将所述参数视为指南。可以对其进行更改，以适合特定的分析或分析仪类型，前提是这些更改经过实验室验证并在报告中注明。 5.3 给定PuO上的吸附气体量 2. 样品可能表明特定的质量或最终使用性能特征。例如，在PuO的情况下，需要对含水量进行特定限制 2. 将被包装并长期储存。

1.1 This test method provides necessary information to determine the total amount of moisture (physisorbed and chemisorbed water molecules) in a plutonium dioxide (PuO 2 ) sample using a combination of thermogravimetric and mass spectrometric analyses. This test method is useful when performing analysis in cases where a maximum amount of moisture content in PuO 2 samples has been agreed upon by interested parties. For example this method can be used to determine the moisture content of some types of PuO 2 packaged to meet the requirements of DOE-STD-3013 ( 1 ) , 2 “Stabilization, Packaging, and Storage of Plutonium-Bearing Materials,” when such PuO 2 meets the specifications given in this test method ( 2 ) . 1.2 This test method is applicable to PuO 2 samples having the following characteristics: Plutonium mass fraction ≥ 83 % (the plutonium in the sample should be close to stoichiometric PuO 2 which is approximately 88 wt% plutonium depending on the isotopic composition of the plutonium, but can have several weight percent impurities), moisture ≤ 1 %. 1.3 The temperature range of test is typically room temperature to greater than 1000 °C. Typically the PuO 2 is heated to 1100 °C. 1.4 This test method utilizes an inert gas environment (argon, nitrogen, or helium). 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 intended for use in quality control laboratories where a quantitative analysis of adsorbed moisture on a PuO 2 sample is desired. 5.2 The parameters described should be considered as guidelines. They may be altered to suit a particular analysis or type of analyzer, provided the changes are validated by the laboratory and noted in the report. 5.3 The quantity of an adsorbed gas on a given PuO 2 sample may indicate specific quality or end use performance characteristics. Specific limits on moisture content, for example, are required in cases where PuO 2 will be packaged and stored for extended periods of time.