1.1 本试验方法包括使用程序A和B测定原油中真实浓度范围为0.02%至5.00质量或体积的水，以及使用程序C测定0.04%至3.75质量或体积的水。硫醇(RSH)和硫化物 − 或H 2 S）由于已知硫会干扰该测试方法，但在低于500 μ g/g[ppm(m)]的水平下，这些化合物的干扰是微不足道的（参见第#节 6 ). 附注1: 为了适应程序C的测试变化，请参考章节 16 检测结果的有效报告范围。 1.2 该测试方法可用于测定0.005%至0.02%质量范围内的水，但尚未确定这些水平下硫醇和硫化物干扰的影响。对于0.005%至0.02%质量范围，没有精密度或偏差声明。1.3 该测试方法旨在与标准市售库仑卡尔费休试剂一起使用。 1.4 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.5 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。 有关具体警告语句，请参见 8 . 1.6 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====== 5.1 准确分析原油样品以确定水含量在原油的精炼、购买、销售或转移中是重要的。

1.1 This test method covers the determination of water with true concentration range from 0.02 % to 5.00 % by mass or volume in crude oils using Procedures A and B and from 0.04 % to 3.75 % by mass or volume for Procedure C. Mercaptan (RSH) and sulfide (S − or H 2 S) as sulfur are known to interfere with this test method, but at levels of less than 500 μg/g [ppm(m)], the interference from these compounds is insignificant (see Section 6 ). Note 1: To accommodate testing variations for Procedure C, refer to Section 16 for valid reporting range of test results. 1.2 This test method can be used to determine water in the 0.005 % to 0.02 % by mass range, but the effects of the mercaptan and sulfide interference at these levels has not been determined. For the range 0.005 % to 0.02 % by mass, there is no precision or bias statement. 1.3 This test method is intended for use with standard commercially available coulometric Karl Fischer reagent. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. For specific warning statements, see Section 8 . 1.6 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 accurate analysis of a crude oil sample to determine the water content is important in the refining, purchase, sale, or transfer of crude oils.