1.1 本试验方法包括测定再生形式的颗粒混合床离子交换材料用于去离子时的性能。它用于测试未使用的混床材料和来自操作装置的再生混床样品。 1.2 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸-磅单位的数学转换，仅供参考，不被视为标准值。 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、健康和环境实践，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 本试验方法可用于评估未使用的混合床离子交换材料是否符合规范。当可以从操作装置中获得混合床的代表性样品时，可以使用本试验方法通过与从相同制造批次的新材料中获得的相同数据或就地产品的保留样品进行比较来评估再生效率。 5.2 本试验方法提供了根据处理至电导率终点的水量计算容量的方法。 5.3 书面试验方法假设阳离子交换材料已用酸再生为氢形式，阴离子交换材料已用碱再生为氢氧化物或游离碱形式。在某些应用中，可能会遇到钾、铵或其他单价形式的阳离子交换材料。可使用试验水A（试验方法）按照本程序对此类材料进行试验 D1782 )作为进水并替代硬度终点（试验方法 D1782 )对于本文规定的终点。 5.4 在大多数情况下，测试产品将适当混合，并将包含正确比例的阴离子和阳离子交换材料。然而，如果测量出水的pH值和电导率，则测试方法将指示哪些成分过量；突破点处的酸性流出物表明再生阳离子交换基团过多，碱性流出物表明再生阴离子交换基团过多。在这种情况下，在最终反洗中获得的两种组分的体积将表明这种不平衡是由于再生不当还是由于两种组分的比例不当引起的。然而，应该注意的是，并非所有单元都具有平衡的阴交换和阳交换基团比例。因此，在可能的情况下，应将现场样品与原始电荷的保留样品进行比较。 5.5 本试验方法提供了湿重或体积基础上的容量计算。虽然这些材料通常是以立方英尺为单位买卖的，但它们实际上是以湿磅为单位包装的。因此，湿重基础上的容量与给定装运中的材料量直接相关。 5.6 体积容量的计算基于反洗和重置床后组件的耗尽、分离体积。选择该体积是因为再生混合床材料样品很难（如果不是不可能的话）在小直径柱中重复包装。 5.7 本试验方法可用于测试混床树脂筒。在这种情况下，必须改变试验水的流速和取样频率，以补偿试样中树脂的近似体积。书面测试假设树脂体积约为330 mL。

1.1 This test method covers the determination of the performance of particulate mixed bed ion exchange materials in the regenerated form when used for deionization. It is intended for use in testing unused mixed bed materials and samples of regenerated mixed beds from operating units. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 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, health, and environmental 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 to evaluate unused mixed bed ion exchange materials for conformance to specifications. When a representative sample of the mixed bed can be obtained from an operating unit, this test method can be used to evaluate the regeneration efficiency by comparison with the same data obtained with new material from the same manufactured lots, or retained samples of the in-place products. 5.2 This test method provides for the calculation of capacity in terms of the volume of water treated to a conductivity end point. 5.3 The test method as written assumes that the cation exchange material has been regenerated to the hydrogen form with acid and the anion exchange material has been regenerated with alkali to the hydroxide or free-base form. In certain applications a cation exchange material in the potassium, ammonium, or other monovalent form may be encountered. Such materials may be tested following this procedure using Test Water A (Test Methods D1782 ) as the influent and substituting the hardness end point (Test Methods D1782 ) for the end points prescribed herein. 5.4 In most cases the product tested will be properly mixed and will contain the correct proportions of anion and cation exchange materials. However, if the pH as well as the conductivity of the effluent is measured, the test method will indicate which of the components is present in excess; an acid effluent at breakthrough indicating an excess of regenerated cation exchange groups and an alkaline effluent an excess of regenerated anion exchange groups. In such cases the volumes of the two components obtained in the final backwash will indicate whether this imbalance arises from improper regeneration or from an improper ratio of the two components. It should be noted, however, that not all units are charged with a balanced ratio of anion-exchanging and cation-exchanging groups. Hence, wherever possible, a field sample should be evaluated in comparison with a retained sample of the original charge. 5.5 This test method provides for the calculation of capacity on either a wet weight basis or a volume basis. Although such materials are normally bought and sold in terms of cubic feet, they are actually packaged in wet pounds. Therefore, it is the capacity on a wet weight basis that is directly correlatable to the amount of material in a given shipment. 5.6 Calculation of a volume capacity is based on the exhausted, separated volume of the components after backwashing and resettling the bed. This volume is chosen because it is difficult, if not impossible, to pack a sample of regenerated mixed bed material in a small-diameter column reproducibly. 5.7 This test method may be used to test mixed bed resin cartridges. In such cases the flow rate of test water and the frequency of sampling must be varied to compensate for the approximate volume of resin in the test sample. The test as written assumes a resin volume of approximately 330 mL.