Abstract: A method and an apparatus determine a content of a foreign gas in a process liquid in which a measurement gas, especially CO2, has been dissolved. A concentration of the measurement gas is ascertained and a concentration of the gas mixture formed by the measurement gas and the foreign gas is ascertained, especially via a manometric measurement method. The measurement values are supplied to an evaluation unit. A concentration of the foreign gas is determined on the basis of the ascertained concentration of the measurement gas and the ascertained concentration of the gas mixture.

Abstract: A method for determining the content quantities, solubilities and/or saturation pressures of gases dissolved in a liquid, which is characterized in that in order selectively to determine the individual content quantities of at least two gases dissolved in a liquid sample, more particularly carbon dioxide, nitrogen and/or oxygen, and/or the solubilities or saturation pressures thereof, the volume of at least one measuring chamber filled with the liquid for testing is increased the volume of at least two steps by volume increase factors differing one from another, each having numerical values greater than 1, in that, after each of the volume increase steps, the equilibrium pressure established in the measuring chamber is ascertained, and in that, on the basis of the at least two measured pressure values obtained in this way, the content quantities of the individual gases dissolved in the liquid, and/or the solubility or saturation pressure thereof, are calculated individually.

Abstract: The invention relates to a new method for determining the content quantities, solubilities and/or saturated vapor pressures of gases dissolved in a liquid, which is characterized in that in order selectively to determine the individual content quantities of at least two gases dissolved in the sample liquid, more particularly carbon dioxide, nitrogen and/or oxygen, and/or the solubilities or saturated vapor pressures thereof, the volume of at least one measuring chamber filled with the liquid for testing is increased in at least two steps by volume increase factors differing one from another—each having numerical values greater than 1—, in that, after each of the volume increase steps, the equilibrium pressure establishing in the measuring chamber is ascertained, and in that, on the basis of the at least two measured pressure values obtained in this way, the content quantities of the individual gases dissolved in the liquid, and/or the solubility or saturated vapor pressure thereof are calculated i