1.1 这些试验方法包括核级二氧化钚粉末和芯块的化学、质谱和光谱化学分析程序，以确定是否符合规范。 1.2 分析程序按以下顺序出现: 小节 钚样品处理 8. 到 10 控制电位库仑法测定钚 2. 硫酸铈滴定法测定钚 3. 铁安培滴定法测定钚（II） 2. 二极管阵列分光光度法测定钚 3. 用纳氏蒸馏分光光度法测定氮 试剂 11 到 18 直接燃烧碳（总量）-导热系数 19 到 29 热水解总氯和氟 30 到 37 蒸馏分光光度法测定硫 38 到 46 质谱法钚同位素分析 4. 稀土元素光谱法 47 到 54 微量元素载体蒸馏光谱法 55 到 62 （替代方法:通过ICP-AES或ICP-MS测定杂质） 火花源质谱法测定杂质元素 63 到 69 库仑电解水分分析仪测定水分 70 到 77 反应堆级二氧化钚芯块中的总气体 5. α光谱法测定钚-238同位素丰度 3. γ射线光谱法测定钚中的镅-241 2. 铜火花光谱法测定稀土 78 到 87 质谱法钚同位素分析 88 到 96 重量法测定氧与金属原子比 97 到 104 1.3 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 1.4 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和健康实践，并确定监管限制的适用性。 有关具体的预防说明，请参阅章节 6. , 16.2.5 , 44.7 , 51.9 和 92.5.1 . ====意义和用途====== 4.1 二氧化钚与二氧化铀混合用作核反应堆燃料。为了适用于此目的，材料必须满足钚含量、同位素成分和杂质含量的某些标准。 这些测试方法旨在显示给定材料是否符合规范中所述的这些项目的规范 C757 . 4.1.1 进行分析以确定材料是否具有干重基础上规定的最低钚含量。 4.1.2 测定二氧化钚粉末中钚的同位素含量，以确定有效裂变含量是否符合买方规范。 4.1.3 杂质含量的测定是为了确保不超过某些杂质元素的最大浓度限制。 如实践中所述，计算等效硼含量（EBC）时也需要测定杂质 C1233 . 4.2 保障措施和核安全应用的适用性- 用于保障和核安全应用的方法应符合指南规定的要求 C1068 用于此类应用。

1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade plutonium dioxide powders and pellets to determine compliance with specifications. 1.2 The analytical procedures appear in the following order: Sections Plutonium Sample Handling 8 to 10 Plutonium by Controlled-Potential Coulometry 2 Plutonium by Ceric Sulfate Titration 3 Plutonium by Amperometric Titration with Iron(II) 2 Plutonium by Diode Array Spectrophotometry 3 Nitrogen by Distillation Spectrophotometry Using Nessler Reagent 11 to 18 Carbon (Total) by Direct Combustion–Thermal Conductivity 19 to 29 Total Chlorine and Fluorine by Pyrohydrolysis 30 to 37 Sulfur by Distillation Spectrophotometry 38 to 46 Plutonium Isotopic Analysis by Mass Spectrometry 4 Rare Earth Elements by Spectroscopy 47 to 54 Trace Elements by Carrier–Distillation Spectroscopy 55 to 62 (Alternative: Impurities by ICP-AES or ICP-MS) Impurity Elements by Spark-Source Mass Spectrography 63 to 69 Moisture by the Coulometric Electrolytic Moisture Analyzer 70 to 77 Total Gas in Reactor-Grade Plutonium Dioxide Pellets 5 Plutonium-238 Isotopic Abundance by Alpha Spectrometry 3 Americium-241 in Plutonium by Gamma-Ray Spectrometry 2 Rare Earths By Copper Spark-Spectroscopy 78 to 87 Plutonium Isotopic Analysis by Mass Spectrometry 88 to 96 Oxygen-To-Metal Atom Ratio by Gravimetry 97 to 104 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Sections 6 , 16.2.5 , 44.7 , 51.9 and 92.5.1 . ====== Significance And Use ====== 4.1 Plutonium dioxide is used in mixtures with uranium dioxide as a nuclear-reactor fuel. In order to be suitable for this purpose, the material must meet certain criteria for plutonium content, isotopic composition, and impurity content. These test methods are designed to show whether or not a given material meets the specifications for these items as described in Specification C757 . 4.1.1 An assay is performed to determine whether the material has the minimum plutonium content specified on a dry weight basis. 4.1.2 Determination of the isotopic content of the plutonium in the plutonium dioxide powder is made to establish whether the effective fissile content is in compliance with the purchaser's specifications. 4.1.3 Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded. Determination of impurities is also required for calculation of the equivalent boron content (EBC) as described in Practice C1233 . 4.2 Fitness for Purpose of Safeguards and Nuclear Safety Applications— Methods intended for use in safeguards and nuclear safety applications shall meet the requirements specified by Guide C1068 for use in such applications.