1.1 这些测试方法涵盖了松树化学物质脂肪酸的测定，包括松香、妥尔油和相关产品。 1.2 这些测试方法可能不适用于松香或其他松木化学产品的加合物或衍生物。 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。 1.4 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====== 5.1 这些测试方法旨在通过将妥尔油作为测试材料来扩大这些测试方法前一版的范围。 试验方法 D803 目前包括测定粗妥尔油中松香酸和脂肪酸含量的方法。试验方法 D803 参考试验方法 D1585 . 5.2 松香和妥尔油主要由松香酸和脂肪酸组成，对这些成分的测量对于确定这些材料的成分非常重要。

1.1 These test methods cover the determination of the fatty acids of pine chemicals, including rosin, tall oil, and related products. 1.2 These test methods may not be applicable to adducts or derivatives of rosin or other pine chemical 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, 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 These test methods are designed to broaden the scope of the previous edition of these test methods by the inclusion of tall oil as a test material. Test Methods D803 currently includes methods for the determination of the rosin acid and fatty acid content of crude tall oil. Test Methods D803 references Test Method D1585 . 5.2 Rosin and tall oil are composed primarily of rosin acids and fatty acids, and the measurement of these components is important in establishing the composition of these materials.