IEC 60567:2023涉及从电力变压器的气体收集继电器中取样游离气体的技术。介绍了三种自由气体取样方法。本文件不再涵盖从充油设备（如电力和仪表变压器、电抗器、套管、充油电缆和充油罐式电容器）中取样油的技术，而是在IEC 60475:2022，4.2中进行了描述。在分析溶解在石油中的气体之前，首先要从石油中提取这些气体。描述了三种基本方法，一种使用真空提取（Toepler和部分脱气），另一种通过使载气鼓泡通过油样来置换溶解气体（汽提），最后一种通过在油样和少量载气之间分配气体（顶部空间）。 气体在提取后通过气相色谱法进行定量分析；描述了一种分析方法。在未经初步处理的情况下，对气体收集继电器中的游离气体进行分析。

IEC 60567:2023 deals with the techniques for sampling free gases from gas-collecting relays from power transformers. Three methods of sampling free gases are described. The techniques for sampling oil from oil-filled equipment such as power and instrument transformers, reactors, bushings, oil-filled cables and oil-filled tank-type capacitors are no longer covered by this document, but are instead described in IEC 60475:2022, 4.2. Before analysing the gases dissolved in oil, they are first extracted from the oil. Three basic methods are described, one using extraction by vacuum (Toepler and partial degassing), another by displacement of the dissolved gases by bubbling the carrier gas through the oil sample (stripping) and the last one by partition of gases between the oil sample and a small volume of the carrier gas (headspace). The gases are analysed quantitatively after extraction by gas chromatography; a method of analysis is described. Free gases from gas-collecting relays are analysed without preliminary treatment.