SETT OCH ANORDNING FOR METNING AV GASANDELEN SYRE, KOLMONOXID OCH KOLDIOXID I GASFORMIGA ELLER FLYTANDE PROVER, I SYNNERHET I ANDEDREKTEN OCH I BLODET

摘要

To measure the proportions of gases, a reagent solution is used which is specific for the gas whose proportion is to be measured and which discolours in a characteristic manner if the gas in question is present. The sample and the respective reagent solution are fed in and mixed together while maintaining a constant ratio of the amounts fed in or the mixing ratio of the sample and the reagent solution. The concentration of the substance producing the colour (O2, CO or CO2) is determined by measuring the absorbance in a photometer. Such a method makes it possible to carry out the measurement for three different gases in the same way and requires inexpensive chemicals only to be replaced in the process.