1.1 该试验方法包括从0测定水 % 至2.0 % 使用Karl Fischer试剂，使用自动库仑滴定程序，测定大多数液体有机化学品的质量。本试验方法不适用于液化气产品，如液化石油气（LPG）、丁烷、丙烷、液化天然气（LNG）等。 1.2 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 查阅当前的安全数据表（SDS），了解有关毒性、急救程序、处理和安全预防措施的详细信息。 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。 具体的预防说明见第节 8. . 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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 库仑法技术特别适用于测定有机液体中的低浓度水，通过卡尔-费休容量法可产生小滴度的水。当水的浓度远大于2.0时，库仑法的精度和准确性会降低 % 因为难以测量所需的小尺寸样品。测试方法假设100 % 库仑在碘生产中的效率。为核实这一效率作出了规定。 （请参阅 表1 和 注5 .)

1.1 This test method covers the determination of water from 0 % to 2.0 % mass in most liquid organic chemicals, with Karl Fischer reagent, using an automated coulometric titration procedure. Use of this test method is not applicable for liquefied gas products such as Liquid Petroleum Gas (LPG), Butane, Propane, Liquid Natural Gas (LNG), etc. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first-aid procedures, handling, and safety precautions. 1.4 This standard does not purport to address all of the safety problems, 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. Specific precautionary statements are given in Section 8 . 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 ====== 4.1 The coulometric technique is especially suited for determining low concentrations of water in organic liquids that would yield small titers by the Karl Fischer volumetric procedure. The precision and accuracy of the coulometric technique decreases for concentrations of water much greater than 2.0 % because of the difficulty in measuring the small size of sample required. The test method assumes 100 % efficiency of coulombs in iodine production. Provision is made for verifying this efficiency. (See Table 1 and Note 5 .)