1.1 本试验方法适用于测定 90 土壤中锶的检测水平取决于计数时间、样本大小、检测器效率、背景和化学产量。 1.2 本试验方法旨在分析10 g土壤，之前按照实践中的描述收集和处理 C998 和 C999 . 该试验方法可能无法完全溶解所有土壤基质。 1.3 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 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、健康和环境实践，并确定监管限制的适用性。 1.5 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 由于土壤是长寿命放射性核素的集成商和储库，并且在人类潜在暴露的几种途径中起着中介作用，因此了解 90 土壤中的锶是必不可少的。土壤采样和分析程序提供了确定土壤中放射性核素浓度和分布的直接方法。土壤分析程序对于运行前监测程序在核设施运行前建立基线浓度具有最重要的意义。土壤分析虽然在涉及意外释放的特殊情况下有用，但可能无法评估小的增量释放。

1.1 This test method is applicable to the determination of 90 Sr in soil at levels of detection dependent on count time, sample size, detector efficiency, background, and chemical yield. 1.2 This test method is designed for the analysis of 10 g of soil, previously collected and treated as described in Practices C998 and C999 . This test method may not be able to completely dissolve all soil matrices. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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. 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 Because soil is an integrator and a reservoir of long-lived radionuclides, and serves as an intermediary in several pathways of potential exposure to humans, knowledge of the concentration of 90 Sr in soil is essential. A soil sampling and analysis program provides a direct means of determining the concentration and distribution of radionuclides in soil. A soil analysis program has the most significance for the preoperational monitoring program to establish baseline concentrations prior to the operation of a nuclear facility. Soil analysis, although useful in special cases involving unexpected releases, may not be able to assess small incremental releases.