1.1 这些测试方法包括羟丙基甲基纤维素的测试。 1.2 测试程序按以下顺序出现: 小节 潮湿 4. 到 6. 灰分（硫酸盐） 7. 到 10 氯化物（如NaCl） 11 到 14 碱度（如Na 2. 一氧化碳 3. ) 15 到 18 铁 19 到 24 重金属 25 到 29 甲氧基含量 30 到 35 羟丙氧基含量 36 到 41 粘度 42 到 46 酸碱度 47 固体 48 到 51 密集 52 到 56 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。 有关具体的危险声明，请参阅 33.5.1 . 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。

1.1 These test methods cover the testing of hydroxypropyl methylcellulose. 1.2 The test procedures appear in the following order: Sections Moisture 4 to 6 Ash (as Sulfate) 7 to 10 Chlorides (as NaCl) 11 to 14 Alkalinity (as Na 2 CO 3 ) 15 to 18 Iron 19 to 24 Heavy Metals 25 to 29 Methoxyl Content 30 to 35 Hydroxypropoxyl Content 36 to 41 Viscosity 42 to 46 pH 47 Solids 48 to 51 Density 52 to 56 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. For a specific hazard statement, see 33.5.1 . 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.