1.1 本试验方法包括铅的测定 2. 内容介于0.01和5之间 %, 液体涂层的非挥发性部分或干膜中的镉含量在50到150 ppm（mg/kg）之间，钴含量在50到2000 ppm（mg/kg）之间。如果对样本大小和试剂量进行了适当稀释和调整，则没有理由相信本试验方法无法测定所有三种元素的更高水平。 1.2 只有着色涂层用于评估该试验方法，但没有理由相信，如果采取适当的预防措施，清漆和清漆无法成功分析。 1.3 本试验方法不适用于含锑颜料样品中铅的测定（回收率低）。 1.4 如果待分析样品中的铅以 有机的 浓度大于0.1的铅化合物 %, 可能会出现较小的导线损耗，导致精度略低于第节所示 12 . 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。 第节给出了具体的危险说明 7. . 1.7 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====== 4.1 某些涂层中重金属的允许水平由政府监管机构规定。本试验方法提供了一个完整的记录程序，用于测定水和溶剂可还原涂层中存在的低浓度铅、镉和钴，以确定合规性。

1.1 This test method covers the determination of lead 2 contents between 0.01 and 5 %, cadmium contents between 50 and 150 ppm (mg/kg), and cobalt contents between 50 and 2000 ppm (mg/kg) present in the nonvolatile portion of liquid coatings or contained in dried films. There is no reason to believe that higher levels of all three elements could not be determined by this test method, provided that appropriate dilutions and adjustments in specimen size and reagent quantities are made. 1.2 Only pigmented coatings were used for evaluating this test method, but there is no reason to believe that varnishes and lacquers could not be analyzed successfully, provided that appropriate precautions are taken. 1.3 This test method is not applicable to the determination of lead in samples containing antimony pigments (low recoveries are obtained). 1.4 If lead is present in the sample to be analyzed in the form of an organic lead compound at a concentration greater than 0.1 %, small losses of lead may occur, resulting in slightly poorer precision than shown in Section 12 . 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 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 hazard statements are given in Section 7 . 1.7 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 ====== 4.1 The permissible level of heavy metals in certain coatings is specified by governmental regulatory agencies. This test method provides a fully documented procedure for determining low concentrations of lead, cadmium, and cobalt present in both water and solvent-reducible coatings to determine compliance.