一、简单介绍指示管法是一种气体分析法,它适用于微量成分的分析。此法先将试剂吸附在载体上,做成指示粉;然后将指示粉装入内径约2—4毫米细玻璃管内,做成指示管(图1)。用玻璃注射器作取样器(图2),吸取一定体积气样(一般为50或100毫升)。将注射器与指示管相连接,推动注射器蕊使气样以一定速度通过指示管,欲测组分与载体上试剂起化学反应,使指示 First, a brief introduction Indicating tube method is a gas analysis method, which applies to the analysis of trace components. This method first adsorption of reagents on the carrier, made of indicator powder; then the indicator powder into the diameter of about 2-4 mm thin glass tube, made of indicator tube (Figure 1). Using a glass syringe as a sampler (Figure 2), draw a volume of gas (typically 50 or 100 ml). The syringe and the indicator tube connected to promote the syringe core so that the sample gas at a certain speed through the indicator tube, test components and reagents on the carrier chemical reaction, the instructions