1.1 试验方法A涵盖了54.9范围内碳的测定 % 至84.7 %, 氢在3.26范围内 % 至5.08 %, 氮在0.57范围内 % 至1.76 % 在分析样本中( 8.1 )焦炭分析样品中煤和碳的含量范围为86.6%-97.9%。 1.1.1 试验方法B包括测定57.7范围内煤炭分析样品中的碳 % 至84.0 %, 焦炭分析样品中的碳含量在86.3%-95.4%之间 %. 注1: 用于推导本标准精度声明的实验室间研究中包括的煤炭包括ASTM等级褐煤A至低挥发性沥青。 有关这些煤成分的更多信息见 附件A4 和 附件A5 . 用于推导方法A焦炭精度声明的实验室间研究中使用的焦炭包括五种冶金（met）焦炭和七种石油（pet）焦炭，方法B包括等量（五种）met焦炭和pet焦炭。 1.2 除非另有说明，否则所有百分比均为质量分数百分比。 1.3 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 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。 1.5 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《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 碳和氢值可用于确定燃烧过程中所需的氧气（空气）量，并用于计算燃烧过程的效率。 5.2 碳和氢测定可用于计算，包括与煤转化过程（如气化和液化）相关的物质平衡、反应性和产品产量。 5.3 碳和氮值可用于用于排放核算目的的物料平衡计算。 注2: 在储存过程中，煤的体积成分随煤的不同而变化。因此，使用煤炭进行校准可能会产生不正确的碳估算，尤其是氢含量。

1.1 Test Method A covers the determination of carbon in the range of 54.9 % to 84.7 %, hydrogen in the range of 3.26 % to 5.08 %, and nitrogen in the range of 0.57 % to 1.76 % in analysis samples ( 8.1 ) of coal and of carbon in analysis samples of coke in the range of 86.6 % to 97.9 %. 1.1.1 Test Method B covers the determination of carbon in analysis samples of coal in the range of 57.7 % to 84.0 %, and carbon in analysis samples of coke in the range of 86.3 % to 95.4 %. Note 1: The coals included in the interlaboratory studies employed to derive the precision statements for this standard cover ASTM rank lignite A to low volatile bituminous. Additional information concerning the composition of these coals appears in Annex A4 and Annex A5 . The cokes used in the interlaboratory study employed to derive the precision statement for coke for Method A included five each metallurgical (met) cokes and seven each petroleum (pet) cokes, and Method B included an equal number (five each) of met cokes and pet cokes. 1.2 All percentages are percent mass fractions unless otherwise noted. 1.3 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 Carbon and hydrogen values can be used to determine the amount of oxygen (air) required in combustion processes and for calculation of the efficiency of combustion processes. 5.2 Carbon and hydrogen determinations can be used in calculations including material balance, reactivity and yields of products relevant to coal conversion processes such as gasification and liquefaction. 5.3 Carbon and nitrogen values can be used in material balance calculations employed for emission accounting purposes. Note 2: The bulk composition of coal changes at a rate that varies from coal to coal during storage. As a result, using coal for calibration can yield incorrect estimates of carbon, and hydrogen content in particular.