1.1 本试验方法描述了一种能量色散X射线荧光（EDXRF）光谱测定程序，用于识别和定量聚合物材料中的铬、溴、镉、汞和铅。 1.2 本试验方法不适用于测定多溴联苯（PBB）、多溴联苯醚（PBDE）或六价铬的总浓度。该测试方法不能用于确定原子或离子的价态。 1.3 本试验方法适用于20 mg/kg至约1 wt的范围 % 用于聚合物材料中的铬、溴、镉、汞和铅。 1.4 本试验方法适用于均质聚合物材料。 1.5 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.6 本试验方法不适用于分析表面上存在一个或多个表面涂层的试样的定量测定； 然而，可以获得定性信息。此外，对于测量的X射线而言，厚度小于无穷大的试样不得涂覆在反面或安装在基板上。 1.7 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。 ====意义和用途====== 5.1 本试验方法用于测定均质聚合物材料中的铬、溴、镉、汞和铅。试验方法可用于确定受试产品是否符合制造规范。根据样品基质和EDXRF光谱仪的性能，每个样品的典型测量时间为5到10分钟。

1.1 This test method describes an energy dispersive X-ray fluorescence (EDXRF) spectrometric procedure for identification and quantification of chromium, bromine, cadmium, mercury, and lead in polymeric materials. 1.2 This test method is not applicable to determine total concentrations of polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE) or hexavalent chromium. This test method cannot be used to determine the valence states of atoms or ions. 1.3 This test method is applicable for a range from 20 mg/kg to approximately 1 wt % for chromium, bromine, cadmium, mercury, and lead in polymeric materials. 1.4 This test method is applicable for homogeneous polymeric material. 1.5 The values stated in SI units are to be regarded as the standard. Values given in parentheses are for information only. 1.6 This test method is not applicable to quantitative determinations for specimens with one or more surface coatings present on the analyzed surface; however, qualitative information may be obtained. In addition, specimens less than infinitely thick for the measured X rays, must not be coated on the reverse side or mounted on a substrate. 1.7 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. ====== Significance And Use ====== 5.1 This test method is intended for the determination of chromium, bromine, cadmium, mercury, and lead, in homogeneous polymeric materials. The test method may be used to ascertain the conformance of the product under test to manufacturing specifications. Typical time for a measurement is 5 to 10 min per specimen, depending on the specimen matrix and the capabilities of the EDXRF spectrometer.