1.1 本试验方法描述了使用与库仑卡尔费休（KF）滴定仪耦合的专用液化气体采样器测定液体丁烷中的水，水浓度为1 mg/kg至100 毫克/千克。 注1: 规范中描述的其他液化石油气 D1835 包括丙烷、丙烯（丙烯）、丁烯以及这些材料和其他轻烃的混合物，以及规范中所述的二甲醚 D7901 ，但尚未研究精度，因此尚未验证这些材料的规定精度。 1.2 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，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。 参见第节 10 具体警告声明。 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 高水浓度可能会对液化石油气（LPG）的许多用途产生不利影响。湿丁烷、丙烷和其他低分子量碳氢化合物产品可能会导致客户设备和下游过程中的操作问题。在液化石油气（LPG）和加压低分子量碳氢化合物样品的储存、分配和使用过程中，水会引起腐蚀问题并产生安全隐患。 5.2 而丙烷的干燥度可以通过“功能”测试进行监测，例如阀门冻结测试方法 D2713 ，本试验方法提供了一种直接测量液化石油气和加压低分子量碳氢化合物及其混合物中水分含量的分析方法。

1.1 This test method describes the use of a specialized liquefied gas sampler coupled to a coulometric Karl Fischer (KF) titrator for the determination of water in liquid butane with water concentrations from 1 mg/kg to 100 mg/kg. Note 1: Other liquefied petroleum gases described in Specification D1835 including propane, propene (propylene), butylenes and mixtures of these materials and other light hydrocarbons, and dimethyl ether described in Specification D7901 , can be analyzed by this method but the precision has not been studied and therefore the stated precision has not been validated for these materials. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units 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. See Section 10 for specific warning statements. 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 High water concentrations can have a detrimental effect on the many uses of liquefied petroleum gas (LPG). Wet butane, propane, and other low molecular weight hydrocarbon products can cause operational issues in customer equipment and downstream processes. Water can cause corrosion problems and create safety hazards during the storage, distribution and use of liquefied petroleum gas (LPG) and pressurized low molecular weight hydrocarbon samples. 5.2 While the dryness of propane may be monitored with a “functional” test such as the valve freeze Test Method D2713 , this test method provides an analytical method to directly measure water content in LPG and pressurized low molecular weight hydrocarbons and their mixtures.