ISO 25140:2010规定了使用火焰离子化检测自动测量固定源废气中甲烷的原理、基本性能标准、质量保证和质量控制程序。它适用于测量干燥或潮湿废气中的甲烷。该方法允许使用永久安装的测量系统进行连续监测，以及对甲烷排放进行间歇性测量。 ISO 25140:2010未规定独立的测量方法。

ISO 25140:2010 specifies the principle, the essential performance criteria, and quality assurance and quality control procedures for an automatic method for measuring methane in the waste gas of stationary sources using flame ionisation detection. It is applicable to measurements of methane in dry or wet waste gases. The method allows continuous monitoring with permanently installed measuring systems as well as intermittent measurements of methane emissions. ISO 25140:2010 does not specify an independent method of measurement.