1.1 这些试验方法包括测定煤或煤燃烧残留物样品中总汞含量的程序。 1.2 以国际单位制表示的值应视为标准值。SI单位后括号中给出的值仅供参考，不视为标准值。 1.3 警告: 汞已被许多监管机构指定为可导致严重医疗问题的危险物质。汞或其蒸汽已被证明对健康有害，对材料具有腐蚀性。 处理汞和含汞产品时应谨慎。有关更多信息，请参阅适用的产品安全数据表（SDS）。用户应注意，法律可能禁止向您所在的州或国家销售汞和/或含汞产品。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。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。 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 燃煤过程中汞的排放可能是一个环境问题。 5.2 当根据其中一个程序分析代表性试样时，总汞代表样品中的浓度。

1.1 These test methods cover procedures to determine the total mercury content in a sample of coal or coal combustion residue. 1.2 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. 1.3 Warning: Mercury has been designated by many regulatory agencies as a hazardous material that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. 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. 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 The emission of mercury during coal combustion can be an environmental concern. 5.2 When representative test specimens are analyzed according to one of these procedures, the total mercury is representative of concentrations in the sample.