LOW TEMPERATURE METHODS FOR SELECTIVE DETERMINATION OF HYDROGEN CONCENTRATION IN GAS ANALYTICAL TECHNOLOGY

The adaptation of known measurement techniques for selective low-temperature measurement of hydrogen concentration in the composition of multicomponent combustible gas mixtures and their practical application in gas analytical technology has been carried out. The proposed approach makes it possible to measure the hydrogen concentration in both hydrogen-hydrocarbon mixtures and hydrogen-air mixtures in a wide temperature range from 20 to 200 °C. The method of measuring the amount of heat released during the combustion of a known volume of hydrogen has been proved to be more accurate than the traditional method of detecting hydrogen concentration by measuring the response of a catalytic sensor.