| abstract |
The invention relates to a method and to a device for performing analyses of breath gas samples according to the preamble of claims 1 and 20. In order to further develop a method and a device such that the same function without the diluting method known from the prior art, and ensuring the precision requirements and rapid online measurement even in a broad range of oxygen concentrations, the invention proposes that calibration data are obtained across targeted variations of interference variables and used for forming a calibration function by means of statistical methods. A method is thereby proposed by means of which the interference variables can be modified independently of each other. Alternatively, the correction data for comparing the CO2 cross-sensitivity influence effects can be first determined in a calibration, wherein the limit concentrations for the working range for CO2 are simultaneously set. In a second step, the correction data and the working range for O2 are set, wherein the CO2 correction had been previously activated. |