1.1 本规程包括从原材料和废材料中提取鞣质。通过该方法获得的水提取物用于测定原材料的鞣质含量。对材料水提取物的总固体、可溶性固体和可溶性非鞣质的分析提供了计算该材料可提取鞣质含量所需的信息。本实践中典型分析的材料类型是树木、树皮、树叶、坚果、水果、根等植物的产品。 以及利用植物产品的工业过程中产生的各种副产品（废料）。 1.2 以国际单位制表示的数值应视为标准。括号中的英寸-磅单位仅供参考。 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 本规程提供了一个标准程序，用于从任何可制备并注入蒸汽的材料中获得水溶性材料（包括单宁）- 夹套抽出器。然后根据测试方法分析萃取溶液 D4903 , D6401 和 D6402 .

1.1 This practice covers extracting the tannin from raw and spent materials. The water extract obtained by this method is used to determine the tannin content of the original material. Analysis for total solids, soluble solids, and soluble non-tannins of the water extract from a material provides the information necessary to calculate the extractable tannin content of that material. The types of materials typically analyzed by this practice are products of plants such as woods, barks, leaves, nuts, fruits, roots, etc. and any of a wide variety of by-products (spent materials) from industrial processes utilizing plant products. 1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only. 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 This practice provides a standard procedure for obtaining the water-soluble materials (including tannins) from any material that can be prepared for and charged to the steam-jacketed extractor. The extraction solutions are then analyzed according to Test Methods D4903 , D6401 , and D6402 .