1.1 本试验方法包括通过气相色谱法测定新的和使用过的绝缘液中浓度高达0.5的2,6-二叔丁基对甲酚和2,6-二叔丁基苯酚 %. 包括规范中规定的I型和II型绝缘矿物油的测定 D3487 ，但也用于测量其他绝缘液体中的这些抑制剂，如酯类和高燃点碳氢化合物。 1.2 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。 1.3 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====== 4.1 在新的电气绝缘油中，本试验方法提供了添加到油中的2,6-二叔丁基对甲酚和2,6-二叔丁基苯酚的定量测量。在用过的油中，测试测量油中残留的这些抑制剂的量。 该测试方法适用于制造控制、规范验收和服务评估。 4.2 该试验方法用于分离、识别和量化抑制剂，且干扰和基质效应最小。 4.3 该试验方法也已成功用于测定其他绝缘液体（如酯类和高温碳氢化合物）中的抑制剂浓度。

1.1 This test method covers the determination by gas chromatography of 2,6-ditertiary-butyl para-cresol and 2,6-ditertiary-butyl phenol in new and used insulating liquids at concentrations up to 0.5 %. It includes the determination in Type I and II insulating mineral oils as specified in Specification D3487 , but has also been used to measure these inhibitors in other insulating liquids, such as esters and high fire-point hydrocarbons. 1.2 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. 1.3 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 In new electrical insulating oil, this test method provides a quantitative measure of the amounts of 2,6-ditertiary-butyl para-cresol and 2,6-ditertiary-butyl phenol that have been added to the oil. In a used oil, the test measures the amount of these inhibitors remaining in the oil. This test method is suitable for manufacturing control, specification acceptance, and service evaluation. 4.2 This test method is used to separate, identify, and quantify the inhibitors with minimal interference and matrix effects. 4.3 This test method has also been used successfully to determine the inhibitor concentrations in other insulating liquids such as esters and high-temperature hydrocarbons.