一、前言对于煤矿来说,历来就把 CO 浓度的变化作为早期发现自然发火的一个指标。过去测定 CO 浓度主要是使用检定管,近年来则开始利用非分散型红外线分析仪进行连续监视。为了及早发现自然发火,分析仪除了测定低浓度的 CO 气体外,还要有防爆结构,否则在环境恶劣情况下不便于实际应用。此外,还有用恒电位电解测定微量 CO I. INTRODUCTION For coal mines, the change of CO concentration has always been taken as an indicator of the early discovery of spontaneous combustion. In the past, the concentration of CO was mainly determined by the use of a test tube. In recent years, it began to be continuously monitored by a non-dispersive infrared analyzer. In order to detect spontaneous combustion as early as possible, in addition to measuring the low concentration of CO gas analyzer, but also have explosion-proof structure, otherwise difficult to practical application in harsh environments. In addition, the use of constant potential electrolysis trace CO