1.1 本试验方法包括使用中子活化分析（NAA）测量塑料或其他碳氢化合物或有机基质中的锑浓度。样品通过研究反应堆的中子辐照激活，随后发射的伽马射线用锗半导体探测器检测。同一系统可用于测定1纳克/克至10 000微克/克范围内的锑浓度，下限受多种干扰限制，上限由已证明的NAA实际应用确定。 1.2 本试验方法可用于固体或液体样品，前提是可以使用非常简单的样品制备方法使其在辐照和计数期间的尺寸和形状符合已知锑含量的标准样品。技术文献中描述了该方法的几种变体。有一本专著全面介绍了使用反应堆中子进行中子活化分析的原理 ( 1. ) . 2. 1.3 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。 1.4 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。 具体预防措施见第节 9 . 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 高浓度的锑通常用于各种材料的阻燃剂配方中。NAA是一种有助于验证这些水平的测试方法，对于其他材料，NAA也有助于以高灵敏度和高精度确定低水平污染量（如有）。 5.2 中子活化分析为多种基体中锑的测定提供了一种快速、高灵敏度、无损的方法。本试验方法独立于锑的化学形态。 5.3 该测试方法可用于石化和其他制造行业的质量和过程控制，并可用于广泛应用的研究目的。

1.1 This test method covers the measurement of antimony concentration in plastics or other hydrocarbon or organic matrix by using neutron activation analysis (NAA). The sample is activated by irradiation with neutrons from a research reactor and the subsequently emitted gamma-rays are detected with a germanium semiconductor detector. The same system may be used to determine antimony concentrations ranging from 1 ng/g to 10 000 μg/g with the lower end of the range limited by numerous interferences and the upper limit established by the demonstrated practical application of NAA. 1.2 This test method may be used on either solid or liquid samples, provided that they can be made to conform in size and shape during irradiation and counting to a standard sample of known antimony content using very simple sample preparation. Several variants of this method have been described in the technical literature. A monograph is available which provides a comprehensive description of the principles of neutron activation analysis using reactor neutrons ( 1 ) . 2 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. Specific precautions are given in Section 9 . 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 High levels of antimony are commonly used in flame retardant formulations for various materials. NAA is a test method that can be useful for verifying these levels and, for other materials, NAA can also be useful in establishing the amount of low level contamination, if any, with high sensitivity and high precision. 5.2 Neutron activation analysis provides a rapid, highly sensitive, nondestructive procedure for antimony determination in a wide range of matrices. This test method is independent of the chemical form of the antimony. 5.3 This test method can be used for quality and process control in the petrochemical and other manufacturing industries, and for research purposes in a broad spectrum of applications.