1.1 本试验方法涵盖了通过波长色散X射线荧光（WDXRF）光谱法测定聚烯烃中元素含量的一般程序，质量分数范围是添加剂、催化剂和反应器工艺的典型贡献。本试验方法涵盖的元素包括氟、钠、镁、铝、硅、磷、硫、钙、钛、铬和锌，其成分范围如 表1 . 1.1.1 本试验方法不适用于专门配制的含有阻燃剂（包括溴化化合物和三氧化二锑）的聚合物。 1.1.2 本试验方法不适用于配制含有高含量钒、钼、镉、锡、钡、铅和汞化合物的聚合物，因为这些元素的光谱干扰或元素间效应会强烈影响其性能。 注1: 用户的具体方法和能力可能因元素间效应和灵敏度、仪器和应用软件以及实验室之间的实践差异而异。 开发和使用测试程序来测量特定元素、质量分数范围或基质是个人用户的责任。 注2: 本文概述了一种通用方法；可以遵循其他分析实践，并在适当的情况下附在注释中。 1.2 以国际单位制表示的值应被视为标准。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 第节给出了具体的预防措施 10 . 注3: 目前还没有与该标准等效的ISO。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 元素分析是反应器后研究、配方树脂中添加剂水平和成品的质量控制措施。X射线荧光光谱法是一种准确且相对快速的方法，用于测定聚乙烯和聚丙烯材料中多种元素的质量分数。

1.1 This test method covers a general procedure for the determination of elemental content in polyolefins by wavelength-dispersive X-ray fluorescence (WDXRF) spectrometry, in mass fraction ranges typical of those contributed by additives, catalysts, and reactor processes. The elements covered by this test method include fluorine, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, calcium, titanium, chromium, and zinc in the composition ranges given in Table 1 . 1.1.1 This test method does not apply to polymers specifically formulated to contain flame retardants including brominated compounds and antimony trioxide. 1.1.2 This test method does not apply to polymers formulated to contain high levels of compounds of vanadium, molybdenum, cadmium, tin, barium, lead, and mercury because the performance can be strongly influenced by spectral interferences or interelement effects due to these elements. Note 1: Specific methods and capabilities of users may vary with differences in interelement effects and sensitivities, instrumentation and applications software, and practices between laboratories. Development and use of test procedures to measure particular elements, mass fraction ranges or matrices is the responsibility of individual users. Note 2: One general method is outlined herein; alternative analytical practices can be followed, and are attached in notes, where appropriate. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 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 precautionary statements are given in Section 10 . Note 3: There is no known ISO equivalent to this standard. 1.4 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 Elemental analysis serves as a quality control measure for post-reactor studies, for additive levels in formulated resins, and for finished products. X-ray fluorescence spectrometry is an accurate and relatively fast method to determine mass fractions of multiple elements in polyethylene and polypropylene materials.