PROCESS AND DEVICE FOR SPECTROSCOPIC QUANTITATIVE DETERMINATION OF GASES IN GAS MIXTURES

摘要

The invention concerns a process and a device for the spectroscopic quantitative determination of gases (4) in gas mixtures, in which periodically alternating monochromatic light (1) of at least two wavelengths is used. The light (1) of at least one wavelength is characteristic, and the light (1) of at least one other wavelength is uncharacteristic, of the transmission of the gas to be determined. This transmission generates electrical signals containing harmonic components of at least one nonlinear Fourier frequency of an emission period, the amplitude of which is proportional to the concentration of the gas (4) to be determined in the gas mixture, and decreased as the concentration increases.