1.1 这些试验方法适用于测定煤和焦炭中的锑、砷、铍、镉、铬、钴、铜、铅、锰、钼、镍、钒和锌。这些试验方法也可用于分析煤炭燃烧过程中的残留物。此外，还概述了与测定煤和煤燃烧残渣中稀土元素有关的具体试验方法。 注1: 这些试验方法可适用于其他微量元素的测定。 注2: 稀土元素包括: 铈、镝、铒、铕、钆、钬、镧、镥、钕、镨、钐、钪、铽、铥、镱和钇。 1.2 单位- 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。 1.2.1 除非另有说明，否则所有百分比均为质量分数百分比。 1.3 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。 1.4 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 煤含有几种元素，其单个质量分数通常小于0.01 %. 这些元素通常统称为微量元素。这些元素主要作为矿物质的一部分存在于煤中。 煤燃烧源中某些微量元素的潜在释放已成为一个环境问题。 5.2 根据这些临时试验方法制备的灰分在数量上保留了下列元素: 1.1 代表它们在煤或焦炭中的质量分数。

1.1 These test methods pertain to the determination of antimony, arsenic, beryllium, cadmium, chromium, cobalt, copper, lead, manganese, molybdenum, nickel, vanadium, and zinc in coal and coke. These test methods can also be used for the analysis of residues from coal combustion processes. Additionally, there are specific test methods outlined that pertain to the determination of rare earth elements in coal and coal combustion residues. Note 1: These test methods may be applicable to the determination of other trace elements. Note 2: Rare earth elements are understood to include: cerium, dysprosium, erbium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, samarium, scandium, terbium, thulium, ytterbium, and yttrium. 1.2 Units— 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. 1.2.1 All percentages are percent mass fractions unless otherwise noted. 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. 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 Coal contains several elements whose individual mass fractions are generally less than 0.01 %. These elements are commonly and collectively referred to as trace elements. These elements primarily occur as part of the mineral matter in coal. The potential release of certain trace elements from coal combustion sources has become an environmental concern. 5.2 The ash prepared in accordance with these provisional test methods quantitatively retains the elements listed in 1.1 and is representative of their mass fractions in the coal or coke.