1.1 本试验方法涵盖了膜过滤器中存在的水可提取材料的重量测定，适用于可提取物的整个浓度范围。 1.2 分析师应意识到，根据实践要求，偏差陈述的协作数据 1777年 未提供。参见第节 11 详细信息。 1.3 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 膜过滤器中存在水溶性可提取物可能会在使用膜过滤器的测试程序中产生错误。然而，如果预先确定特定膜的水溶性可提取物的量，则可以消除或显著减少这些误差。 某些膜过滤器的使用需要最大水溶性可提取水平的规范。本试验方法旨在快速测定水溶性化合物（如增塑剂或润湿剂）从过滤膜中的损失。该测试方法的设计不是为了预先确定过滤器的性能，而是为了确定来自不同来源的膜的可提取百分比和来自单一来源的批次变化。

1.1 This test method covers the gravimetric determination of the water-extractable material present in membrane filters and is applicable over the complete concentration range of extractables. 1.2 The analyst should be aware that collaborative data for a bias statement as required by Practice D2777 is not provided. See Section 11 for details. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 ====== 5.1 The presence of water-soluble extractables in membrane filters can create errors in test procedures employing membrane filters. However, these errors can be eliminated or significantly reduced if the quantity of water-soluble extractables of the specific membrane is previously determined. Certain membrane filter uses require specifications of maximum water-soluble extractable levels. This test method is intended to be a rapid test to determine the loss of water-soluble compounds such as plasticizers or wetting agents from filtration membranes. This test method is not designed to predetermine the performance of a filter, but is significant in determining the percent extractables of membranes from different sources and lot variations from a single source.