1.1 本试验方法包括测定阴离子交换材料用于从水中去除盐酸和硫酸时的工作容量。其设计用于模拟强酸去除的操作条件，并用于测试新材料和旧材料。 1.2 以国际单位制表示的数值应视为标准。括号中的英寸-磅单位仅供参考。 1.3 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和健康实践，并确定监管限制的适用性。 1.4 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 该试验方法可用于评估商用阴离子交换材料的性能，无论离子交换基团的基本强度如何。当已知以前的操作历史时，通过与以相同方式评估的未使用离子交换材料的参考样品进行比较，可以很好地解释树脂污染或故障。 5.2 虽然电阻率已被选为确定耗尽终点的首选分析方法，滴定是替代方法，但可以理解的是，在冲洗和服务运行期间观察pH值可以产生有用的信息。当与以相同方式耗尽的未使用材料的参考样品的类似数据进行比较时，使用怀疑已降解的离子交换材料观察到的pH变化有助于解释性能。

1.1 This test method covers the determination of the operating capacity of anion-exchange materials when used for the removal of hydrochloric and sulfuric acid from water. It is designed to simulate operating conditions for strong acid removal and is intended for use in testing both new and used materials. 1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only. 1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. 1.4 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 can be used for evaluating performance of commercially available anion-exchange materials regardless of the basic strength of the ion exchange groups. When previous operating history is known, a good interpretation of resin fouling or malfunction can be obtained by comparison against a reference sample of unused ion-exchange material evaluated in the same way. 5.2 While resistivity has been chosen as the preferred analytical method for defining the exhaustion end point, with titration as the alternative, it is understood that observation of pH during rinse and the service run can yield useful information. The variations in pH observed with an ion exchange material suspected of having degraded, can be helpful in interpretation of performance when compared with similar data for a reference sample of unused material exhausted in the same way.