1.1 该试验方法涵盖了硬木材和软木材、草本材料（如柳枝稷和蚕桑）、农业残留物（如玉米秸秆、小麦秸秆和蔗渣）和废纸（如办公垃圾、纸板和新闻纸）的乙醇可溶性提取物的测定，以烘干生物量的百分比表示。所有结果都是相对于样品的烘干固体的质量报告的。 注1: 该试验方法可能不适用于包括树皮或含有10%以上可提取材料的硬木材和软木材样品。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 乙醇提取物是在生物质中发现的任何可溶于乙醇的物质。它们不被视为生物质结构成分的一部分，应在对样品进行任何化学分析之前将其去除。长期提取可以去除非结构性物质，包括蜡、脂肪、树脂、单宁、树胶、糖、淀粉和色素。从生物质中去除疏水性材料使得更容易润湿用于分析生物质中的结构成分的材料。 4.2 该试验方法产生的结果与试验方法相当 D1107 .

1.1 This test method covers the determination of ethanol soluble extractives, expressed as a percentage of the oven-dried biomass, of hard and soft woods, herbaceous materials (such as switchgrass and sericea), agricultural residues (such as corn stover, wheat straw, and bagasse), and wastepaper (such as office waste, boxboard, and newsprint). All results are reported relative to the mass of the oven-dried solids of the sample. Note 1: This test method may not be suitable for hard and soft wood samples that include bark or those with more than 10% extractable materials. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 ====== 4.1 Ethanol extractives are any materials found in biomass that are soluble in ethanol. They are not considered to be part of the structural components of biomass and should be removed prior to any chemical analysis of the sample. The prolonged extraction removes nonstructural materials that can include waxes, fats, resins, tannins, gums, sugars, starches, and pigments. Removing hydrophobic materials from the biomass makes it easier to wet the material for the analysis of structural components in the biomass. 4.2 This test method yields results comparable to Test Method D1107 .