1.1 这些试验方法包括测定妥尔油的皂化值，以及术语中定义的妥尔油分馏产品，如松香、脂肪酸和蒸馏妥尔油 D804 这些测试方法也适用于树胶和木松香。两种测试方法如下: 1.1.1 采用电位滴定法的测试方法，以及 1.1.2 使用内部指示剂法的测试方法。 1.2 电位滴定法适用于浅色和深色的测试样品。这应该被视为裁判方法。内部指示剂法仅适用于浅色和中等颜色的测试样品。 应将其视为替代方法。 1.3 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 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====== 3.1 这些测试方法旨在通过将妥尔油和妥尔油衍生产品作为测试材料来扩大测试方法早期版本的范围，并在测试方法中引用 D803 . 3.2 皂化值是妥尔油及其分馏产物的重要性质。这是一种广泛用于测定这些产品游离酸和结合酸总含量的测试方法。 3.3 当需要最可重复的结果时，应使用电位测试方法。

1.1 These test methods cover the determination of the saponification number of tall oil and products obtained by the fractionation of tall oil such as rosin, fatty acids and distilled tall oil as defined in Terminology D804 . These test methods are also applicable to gum and wood rosin. Two test methods are covered as follows: 1.1.1 Test method using a potentiometric method, and 1.1.2 Test method using an internal indicator method. 1.2 The potentiometric method is suitable for use with both light- and dark-colored test samples. It should be considered the referee method. The internal indicator method is suitable for use only with light- and medium-colored test samples. It should be considered the alternate method. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 1.5 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 ====== 3.1 These test methods are designed to broaden the scope of the earlier editions of the test method by the inclusion of tall oil and tall oil derived products as test materials and is referenced in Test Methods D803 . 3.2 The saponification number is an important property of tall oil and the products obtained by the fractionation of tall oil. It is the test method widely used to determine the total acid content, both free and combined, of these products. 3.3 The potentiometric test method should be used when the most reproducible results are required.