1.1 这些测试方法包括测试醋酸纤维素的程序。 1.2 测试程序见以下章节: 小节 灰 8. 到 11 颜色和雾度 67 到 72 组合乙酰或乙酸含量 试验方法A.溶液法 17 , 19 到 23 试验方法B.非均相皂化法 17 , 24 到 26 游离酸度 12 到 16 热稳定性 47 到 56 羟基含量 27 到 33 特性粘度 57 到 62 含水量 4. 到 7. 初级羟基含量 34 到 39 硫或硫酸盐含量 40 到 45 粘度 63 到 66 1.3 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。 1.4 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。 1.5 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 纤维素酯的含水量可用于估计纤维素酯的干重。由于纤维素酯是干燥剂，其含水量可能因储存而有很大变化。

1.1 These test methods cover procedures for testing cellulose acetate. 1.2 The test procedures appear in the following sections: Sections Ash 8 to 11 Color and Haze 67 to 72 Combined Acetyl or Acetic Acid Content Test Method A. Solution Method 17 , 19 to 23 Test Method B. Heterogeneous Saponification Method 17 , 24 to 26 Free Acidity 12 to 16 Heat Stability 47 to 56 Hydroxyl Content 27 to 33 Intrinsic Viscosity 57 to 62 Moisture Content 4 to 7 Primary Hydroxyl Content 34 to 39 Sulfur or Sulfate Content 40 to 45 Viscosity 63 to 66 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 ====== 4.1 Moisture content of the cellulose ester can be used to estimate the dry weight of the cellulose ester. Since cellulose esters are desiccants, their moisture content can vary greatly depending on storage.