1.1 本试验方法包括测定蓝湿和白湿中的总灰分。 1.2 对于湿白中的总灰分，程序相同；在标准中用湿白色代替湿蓝色。 1.3 蓝湿革中的总灰分可以在许多不同的基质上报告（例如，接收时无脂肪、无水分，不包括铬等）。在进行任何试验之前，确定报告总灰分的依据，并确定为实现确定的报告方法而需要执行的所有其他试验方法，这一点非常重要。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 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。 1.6 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====== 5.1 本试验方法有助于测定蓝湿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，可通过减去可方便地在灰分上测定的氧化铬来测定蓝湿革中其他元素的近似百分比。（见试验方法 D6714 .) 5.2 600°C的规定温度足以产生可重复的结果，但不会使氧化铝（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 wet blue and wet white. 1.2 For total ash in wet white, the procedure is identical; substitute wet white for wet blue in the standard. 1.3 Total ash in wet blue may be reported upon a number of different bases (for example, fat-free, moisture-free, as received, excluding chromium, and so forth). Before proceeding with any tests, it is very important to determine upon which basis that the total ash is to be reported and to identify all other test methods that will be required to be executed in order to achieve the determined reporting method. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 This test method is useful in determining the approximate amount of nonvolatile inorganic material in wet blue. 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 wet blue may be determined by subtracting the chromic oxide that may be conveniently determined on the ash. (See Test Method D6714 .) 5.2 The specified temperature of 600°C 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.