1.1 本试验方法包括用高效液相色谱法对发动机冷却液中的唑类化合物和有机酸进行化学分析。 1.2 此测试方法适用于新的和使用过的发动机冷却液。 1.3 根据设备校准范围的要求，除稀释和过滤外，可以通过该测试方法直接进行分析，无需预处理。 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。 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 该试验方法提供了发动机冷却液中常见有机添加剂的定性和定量测定，单位为毫克/升，每次试验只需要几毫升样品，结果通常在12分钟内得出。

1.1 This test method covers the chemical analysis of engine coolant for azoles and organic acids by high performance liquid chromatography (HPLC). 1.2 This test method is applicable to both new and used engine coolant. 1.3 Analysis can be performed directly by this test method without pretreatment other than dilution and filtration, as required by the calibration ranges of the equipment. 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 This test method provides for the qualitative and quantitative determination of common organic additives in engine coolant in milligrams per liter and only requires a few milliliters of sample per test, with results typically available in 12 min.