1.1 本试验方法涵盖皮革中总灰分的测定。 1.2 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。 1.3 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 本试验方法可用于测定皮革中非挥发性无机材料的近似量。这可能以盐或元素氧化物的形式存在。在混合铬鞣中，皮革中其他元素的近似百分比可通过减去可方便地在灰分上测定的氧化铬来测定。（见试验方法 D2807 .) 4.2 规定的600°C温度足以产生可重复的结果，但它不会使氧化铝（Al）等氧化物完全脱水 2. O 3. )和氧化铬（Cr 2. O 3. ). 同样，硫酸盐和磷酸盐等盐可能未完全脱水，如果碱和铬同时存在，则可能氧化为铬酸盐。 因此，在根据元素的定量关系得出结论时应谨慎。

1.1 This test method covers the determination of total ash in leather. 1.2 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. 1.3 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 This test method is useful in determining the approximate amount of nonvolatile inorganic material in leather. This may be in the form of salts or oxides of the elements. In a mixed chrome tannage, the approximate percentage of other elements in the leather may be determined by subtracting the chromic oxide that may be conveniently determined on the ash. (See Test Method D2807 .) 4.2 The temperature of 600 °C specified is high enough to produce a reproducible result but it does not completely dehydrate such oxides as aluminum oxide, (Al 2 O 3 ) and chromic oxide (Cr 2 O 3 ). Likewise, such salts as sulfates and phosphates may be incompletely dehydrated, and if alkalis and chromium are present simultaneously, oxidation to chromate may occur. Therefore, caution is advised in drawing conclusions based on quantitative relations of the elements.