1.1 这些测试方法包括测定水的电导率和电阻率。包括以下测试方法: 范围 小节 试验方法A-现场和常规实验室 10至200 000 12 到 18 静态（非流动）样品的测量 μS/cm 测试方法B-连续在线测量 5至200 000 19 到 23 第页 μS/cm 1.2 这些测试方法已经在试剂水中进行了测试。用户有责任确保这些测试方法对未经测试的基质水的有效性。 1.3 有关低于这些测试方法范围的测量值，请参阅测试方法 第5391页 . 1.4 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。 1.5 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。 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====== 4.1 这些测试方法适用于杂质检测等目的，在某些情况下，还适用于溶解在水中的离子成分的定量测量。其中包括天然水和处理过的水中的溶解电解质，如锅炉水、锅炉给水、冷却水以及盐水和微咸水。 4.1.1 它们的浓度可能在纯水中的微量水平之间 ( 2. ) 4. 至冷凝蒸汽中的显著水平（见试验方法 第2186页 和 第4519天 ，和参考 ( 3. ) )，或纯盐溶液。 4.1.2 如果使用电导率方法的主要目的是确定蒸汽纯度，请参见参考 ( 4. ) 这些试验方法也可用于检查水分析的正确性 ( 5. ) .

1.1 These test methods cover the determination of the electrical conductivity and resistivity of water. The following test methods are included: Range Sections Test Method A—Field and Routine Laboratory 10 to 200 000 12 to 18 Measurement of Static (Non-Flowing) Samples μS/cm Test Method B—Continuous In-Line Measure 5 to 200 000 19 to 23 ment μS/cm 1.2 These test methods have been tested in reagent water. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices. 1.3 For measurements below the range of these test methods, refer to Test Method D5391 . 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. 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 ====== 4.1 These test methods are applicable for such purposes as impurity detection and, in some cases, the quantitative measurement of ionic constituents dissolved in waters. These include dissolved electrolytes in natural and treated waters, such as boiler water, boiler feedwater, cooling water, and saline and brackish water. 4.1.1 Their concentration may range from trace levels in pure waters ( 2 ) 4 to significant levels in condensed steam (see Test Methods D2186 and D4519 , and Ref ( 3 ) ), or pure salt solutions. 4.1.2 Where the principal interest in the use of conductivity methods is to determine steam purity, see Ref ( 4 ) . These test methods may also be used for checking the correctness of water analyses ( 5 ) .