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Hoover曾利用吸附有五氧化二碘,发烟硫酸的浮石作指示胶,制成检定管,作为一氧化碳的快速测定方法,该法缺点是灵敏度不高,Shepherd用吸附了硫酸钯及钼酸铵的硅胶作指示胶而制成的一氧化碳检定管,灵敏度很高,且容易比色。但当气样中含有氮氧化物时,对测定有干扰,我们根据文献试制了在含有氮氧化物的气样中,一氧化碳快速检定管(C型C O检定管)。检定管的作用原理:检定管是以吸附有硫酸钯及钼酸铵的硅胶作指示剂,C O与其作用,在钯的催化下,硅钼酸还原成钼蓝,根据变色深浅,测定C O的含量,在气样进口的一端,装有一段吸附了铬酸的硅胶,当气样通过铬酸硅胶时,其中所含的氮氧化物,变为硝酸
Hoover has used the adsorption of iodine dioxide, fuming sulfuric acid pumice as indicator glue, made of test tube, as a rapid determination of carbon monoxide, the shortcomings of this method is not sensitive, Shepherd adsorption of palladium sulfate and ammonium molybdate Silica gel for the indicator made of carbon monoxide test tube, high sensitivity, and easy to color. However, when the sample contained nitrogen oxides, there was interference with the measurement. According to the literature, we developed a carbon monoxide rapid calibration tube (C-type C O test tube) for nitrogen oxide-containing gas samples. The principle of the test tube: the test tube is adsorbed with palladium sulfate and ammonium molybdate as an indicator, CO and its role in the palladium catalyst, molybdate molybdenum reduction to molybdenum blue, according to the color depth, the determination of CO content , At the end of the gas sample imports, equipped with a section of adsorbed chromic acid silica gel, when the sample through the chromic acid silica gel, which contained nitrogen oxides, into nitric acid