1.1本规程涵盖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。本规程通常分析的材料类型为植物产品，如木材、树皮、树叶、坚果、水果、根等，以及利用植物产品的工业过程中的各种副产品（废材料）。 1.3本标准无意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和健康实践，并确定监管限制的适用性。

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. 1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.