1.1 本试验方法包括通过在酸化的浓盐溶液上提取未分解的硫酸脂肪和其他脂肪物质，在蒸发溶剂后用硫酸煮沸残渣，并滴定反应产物，来测定硫酸化油样品中存在的有机结合硫酸酐。本试验方法仅适用于分解其组合SO的硫酸化油 3. 用矿物酸煮沸后，包括含有乙酸钠或其他不能在以甲基橙为指示剂的水溶液中准确滴定的化合物的样品。本试验方法源自试验方法 D500 ，第20节至第24节，以及ALCA方法H-43。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 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====== 3.1 本试验方法旨在测定硫酸化油中有机结合的硫酸酐。

1.1 This test method covers the determination of the organically combined sulfuric anhydride existing in a sample of sulfated oil by extracting the undecomposed sulfated fat and other fatty matter over an acidulated, concentrated salt solution, boiling the residue with sulfuric acid after evaporating the solvent, and titrating the products of reaction. This test method is applicable only to sulfated oils that split off their combined SO 3 upon boiling with mineral acids, including samples containing sodium acetate or other compounds that cannot be accurately titrated in water solution with methyl orange as the indicator. This test method was derived from Test Methods D500 , Sections 20 through 24, and ALCA Method H-43. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided 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 ====== 3.1 This test method is intended for the determination of organically combined sulfuric anhydride in sulfated oils.