Method and arrangement for determining the proportion in gas mixtures

The invention relates to a method and a measuring arrangement for determining the proportion of a specific gas or its partial pressure in a gas mixture. The invention provides for a part quantity extracted from the gas mixture to be led, as gas to be measured, through a liquid, in which a reversible partial-pressure-dependent solution equilibrium of the gas to be determined is established, for the quantity of the gas dissolved in the liquid to be measured by an electrode which is sensitive to this gas or to a compound of this gas, and for the output signal from the electrode to be picked off as the measured value corresponding to the gas proportion or the partial pressure of the gas to be determined in the gas atmosphere.