1.1 这些测试方法仅涵盖以下商业产品通常需要的分析: 1.1.1 烧碱（氢氧化钠），50和73 % 酒；无水（固体、片状、研磨或粉末），以及 1.1.2 苛性钾（氢氧化钾），45 % 酒无水（固体、薄片、研磨或粉末）。 1.2 分析程序按以下顺序出现: 碱度（总），滴定法（50至100 % NaOH和45至100 % KOH） 3到4 碳酸盐，气体体积（0.001 g CO 2. ，最小） 4到7 碳酸盐，重量分析（0.001 g CO 2. ，最小） 7至10 氯化物，滴定，（0.001 g Cl − ，最小） 10至11 氯化物，电位滴定（0.3至1.2 %) 11至12 氯离子选择电极（0.6至120μg/g） 12至13 铁，光度法（0.005 mg Fe，min） 13至15 硫酸盐，重量分析，（0.002 g SO 3. ，最小） 15至16 关键词 16 1.3 单位- 以国际单位制表示的数值应视为标准值。 本标准中不包括其他测量单位，但用于仪器描述的英寸-磅单位除外。 1.4 在使用该方法确定测试结果是否符合适用规范时，应根据修约方法对结果进行修约 E29年 . 1.5 查看当前的安全数据表（SDS），了解有关毒性、急救程序、处理和安全预防措施的详细信息。 1.6 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。 第节给出了具体的危险说明 6. . 1.7 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 烧碱和苛性钾用于大量制造过程。根据其预期用途，这些化学品有几种等级。中列出的测试方法 1.2 提供分析苛性钠和苛性钾的程序，以确定它们是否适合其预期用途。

1.1 These test methods cover only the analyses usually required on the following commercial products: 1.1.1 Caustic soda (sodium hydroxide), 50 and 73 % liquors; anhydrous (solid, flake, ground, or powdered), and 1.1.2 Caustic potash (potassium hydroxide), 45 % liquor; anhydrous (solid, flake, ground, or powdered). 1.2 The analytical procedures appear in the following order: Alkalinity (Total), Titrimetric (for 50 to 100 % NaOH and 45 to 100 % KOH) 3 to 4 Carbonate, Gas-Volumetric (0.001 g CO 2 , min) 4 to 7 Carbonate, Gravimetric (0.001 g CO 2 , min) 7 to 10 Chloride, Titrimetric, (0.001 g Cl − , min) 10 to 11 Chloride, Potentiometric Titration (0.3 to 1.2 %) 11 to 12 Chloride, Ion Selective Electrode (0.6 to 120 μg/g) 12 to 13 Iron, Photometric (0.005 mg Fe, min) 13 to 15 Sulfate, Gravimetric, (0.002 g SO 3 , min) 15 to 16 Keywords 16 1.3 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of inch-pound units for apparatus descriptions. 1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29 . 1.5 Review the current Safety Data Sheet (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions. 1.6 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. Specific hazard statements are given in Section 6 . 1.7 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 Caustic soda and caustic potash are used in a large number of manufacturing processes. The chemicals are available in several grades depending on their intended use. The test methods listed in 1.2 provide procedures for analyzing caustic soda and caustic potash to determine if they are suitable for their intended use.