1.1 这些试验方法包括水分含量的测定( 国会议员 )木材、单板和其他木质材料，包括含有粘合剂和化学添加剂的材料。测试程序按以下顺序出现: 小节 方法A-一次烘箱干燥法 5. 方法B——二次烘箱干燥法 6. 1.2 主要烘箱干燥方法（方法A）是唯一的主要方法。其结构用于需要最高精度或精密度的目的（例如，研究或校准）。 1.3 二次烘箱干燥方法（方法B）旨在用于不需要或不合理的主要程序（方法A）的目的。该方法的测试结果通常不如方法A精确。 1.4 对于经过化学处理或浸渍杂酚油、石油及其溶液的材料，烘箱干燥程序会产生比预期结果更大的偏差，建议使用其他方法，如AWPA A6。 1.5 单位- 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。 1.6 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。 1.7 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====== 4.1 含水率是影响木材和木质材料性能的最重要变量之一。这些测试方法中的程序结构允许从基础研究到工业加工的全范围使用。方法A是测定木材和木材含水量的参考（主要）标准- 基于材料，旨在获得符合用户需求的最精确含水量值。它提供了评估由烘箱或样本吸湿性或两者引起的可变性的方法。此外，描述了定义烘箱干燥终点的标准。方法B提供了相对简单的水分含量测量程序，但通常精度低于方法a。需要考虑样本对全尺寸产品的代表性，包括节疤、边材和心材。不建议将这些方法用于浸渍有杂酚油、石油及其溶液的处理过的木制品，其中挥发性物质不存在- 样本中包含的木材化学物质比结果中预期的偏差更大。

1.1 These test methods cover the determination of the moisture content ( MC ) of wood, veneer, and other wood-based materials, including those that contain adhesives and chemical additives. The test procedures appear in the following order: Sections Method A—Primary Oven-Drying Method 5 Method B—Secondary Oven-Drying Method 6 1.2 The primary oven-drying method (Method A) is intended as the sole primary method. It is structured for purposes where the highest accuracy or degree of precision is needed (for example, research or calibration). 1.3 The secondary oven-drying method (Method B) is intended for the purposes where the primary procedure (Method A) is not desired or justified. Test results in this method are generally less precise than in Method A. 1.4 For materials that have been chemically treated or impregnated with creosote, petroleum, and their solutions such that the oven-drying procedures introduce greater bias than desired in the results, other methods, such as AWPA A6, are recommended. 1.5 Units— 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. 1.6 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. 1.7 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 Moisture content is one of the most important variables affecting the properties of wood and wood-based materials. The procedures in these test methods are structured to permit the full range of use from fundamental research to industrial processing. Method A is the reference (primary) standard for determining moisture content of wood and wood-based materials, which is designed for obtaining the most precise values of moisture content consistent with the needs of the user. It provides means of assessing variability contributed by the oven or specimen hygroscopicity, or both. In addition, criteria are described for defining the endpoint in oven-drying. Method B provides relatively simple procedures of measuring moisture content, but generally with a lower precision than Method A. Representativeness of the specimens to the full-size product, including knots, sapwood, and heartwood, needs to be considered. These methods are not recommended for use with treated wood products impregnated with creosote, petroleum, and their solutions where the volatile non-wood chemicals contained in the specimen introduce greater bias than desired in the results.