一氧化碳和吸附在活性硅胶上的五氧化二碘反应生成的游离碘变色层高度与被检测气体中一氧化碳含量成正比。利用这个原理而制成的比长式一氧化碳检定管,具有结构简单、容易制作、直接快速等优点,基本可以满足煤矿需要。因此,近年来生产比长式一氧化碳检定管的单位越来越多,产量很大,使用面越来越广。但由于生产工艺不统一,检定管的质量还有一定问题。为进一步提高检定管质量,有必要统一一氧化碳检定管的检验方法。 The height of the free iodine discoloration layer produced by the reaction between carbon monoxide and pentoxide dioxide adsorbed on the active silica gel is proportional to the amount of carbon monoxide in the gas being detected. Using this principle and made than the long carbon monoxide test tube, has the advantages of simple structure, easy production, direct and quick, basically meet the needs of coal mines. Therefore, in recent years, the production of carbon monoxide than long-carbon test tube units more and more output, use more and more widely. However, due to the production process is not uniform, the quality of the test tube there are some problems. In order to further improve the quality of test tube, it is necessary to unify the test method of carbon monoxide test tube.