1.1 本试验方法用于测定水与活性炭初始接触时的pH值。本试验方法不能替代试验方法 D3838 并且可以给出不同的值。 1.2 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 1.3 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》中确立的国际公认的标准化原则制定的。======意义和用途====== 4.1 接触pH的测定可用作简单且快速的测量，其可允许活性炭生产者和使用者具有用于评估各种碳对与碳接触的水的初始pH的影响的标准方法。已确定该方法与试验方法之间存在偏差 D3838 ;它们是不等价的。

1.1 This test method is to be used in the determination of the pH of water on initial contact with activated carbon. This test method is not meant as a replacement for Test Method D3838 and may give a different value. 1.2 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. 1.3 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 ====== 4.1 The determination of contact pH can be used as a simple and fast measurement that can allow activated carbon producers and users to have a standard method for assessing the effect various carbons will have on the initial pH of the water in contact with the carbon. It has been determined that there is a bias between this method and Test Method D3838 ; they are not equivalent.