1.1 本试验方法包括测定按照规程制备的煤或焦炭分析样品中作为灰分的无机残留物 D2013年 或练习 D346页 . 所得结果可作为工业分析实践中的灰分 D3172 归根结底，是实践 D3176 . 对于灰中成分的测定，请参考试验方法 D3682 , D4326 和 D6349 . 试验方法 D6357 应用于制备用于微量元素分析的灰分。参见术语 D121 用于定义灰分。 1.2 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。 1.3 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 根据本试验方法测定的灰分是煤和焦炭燃烧后残留的残渣。所得灰分的成分不同于原煤中的无机成分。焚烧会导致所有水的排出、碳酸盐中二氧化碳的损失、黄铁矿转化为氧化铁以及其他化学反应。根据本试验方法确定的灰分数量将不同于熔炉操作和其他燃烧系统中产生的灰分，因为焚烧条件影响灰分的化学成分和数量。修正本试验方法测定的矿物灰分结果的参考文献- 分类中列出了无物质基础 D388页 ，第9节。

1.1 This test method covers the determination of the inorganic residue as ash in the analysis sample of coal or coke as prepared in accordance with Practice D2013 or Practice D346 . The results obtained can be applied as the ash in the proximate analysis, Practice D3172 , and in the ultimate analysis, Practice D3176 . For the determination of the constituents in ash, reference is made to Test Methods D3682 , D4326 , and D6349 . Test Methods D6357 should be used to prepare ash to be used for trace element analysis. See Terminology D121 for definition of ash. 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 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 Ash, as determined by this test method, is the residue remaining after burning the coal and coke. Ash obtained differs in composition from the inorganic constituents present in the original coal. Incineration causes an expulsion of all water, the loss of carbon dioxide from carbonates, the conversion of iron pyrites into ferric oxide, and other chemical reactions. Ash, as determined by this test method, will differ in amount from ash produced in furnace operations and other firing systems because incineration conditions influence the chemistry and amount of the ash. References for correcting ash results determined by this test method to a mineral-matter-free basis are listed in Classification D388 , Section 9.