1.1 本试验方法涵盖卤化有机溶剂及其外加剂水萃取物pH值的测量。本试验方法适用于测定未经处理、回收或使用溶剂的水提取物的pH值。 1.2 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。 1.3 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 卤化溶剂的pH值根据特定溶剂中稳定剂的性质而变化。含有碱性稳定剂（胺型）的溶剂的pH值通常在7到11范围内，而含有中性稳定剂（环氧化物型）的溶剂的pH值通常在5到7范围内。 3.2 原始溶剂和回收溶剂的pH值应在这些范围内，具体取决于所声称的稳定方法。这些值应在原始原始溶剂生产商提出的可接受范围内。 3.3 在接收或使用时，pH值低于上述值是令人担忧的。在这种情况下，应测试含有环氧化物稳定剂的溶剂的酸性接受度；应测试含有碱性稳定剂的溶剂的碱度。

1.1 This test method covers the measurement of the pH of water extractions of halogenated organic solvents and admixtures thereof. This test method is applicable for the determination of the pH of water extractions of virgin, reclaimed, or used solvents. 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 ====== 3.1 The pH of halogenated solvents varies according to the nature of stabilizers in the particular solvent. Solvents with alkaline stabilizers (amine-types) generally have pHs in the 7 to 11 range, whereas solvents containing neutral stabilizers (epoxide-types) generally have pHs in the 5 to 7 range. 3.2 Virgin and reclaimed solvents should have pHs within these ranges, dependent upon the claimed method of stabilization. These values should be within the accepted limits as proposed by the producers of the original virgin solvent. 3.3 A lowering of pH from the above values, on receipt or use, is cause for concern. In this event, solvents having epoxide stabilizers should be tested for acid acceptance; solvent having alkaline stabilizers should be tested for alkalinity.