Determination of Carbon Monoxide in Small Gas Volumes

Abstract

Summary. A method is described for analysis of CO in small gas volumes with hopcalite CO‐meters. By the use of electrical temperature measurement and registration with direct writing potentiometers the applicability of these CO‐meters has been greatly increased. Amounts of pure CO, from about 0.001 ml up to about 1 ml, can be measured with marked accuracy in gas volumes from 0.02 to about 500 ml irrespective of the CO concentration. Accurate calibration can be obtained by comparison with 100 per cent CO without dilution procedures. The method was found especially suitable for analysis of small amounts of CO extracted from blood samples.