Measuring concentrations of individual solution components in mixtures e.g. bodily fluids with dissolved components, comprises arranging measuring sample in measuring arm of interferometer, and registering interferogram by photodetector

摘要

The method for measuring the concentrations of individual solution components in mixtures e.g. bodily fluids with dissolved components, comprises arranging a measuring sample in a measuring arm of an interferometer, registering and then Fourier transforming interferogram G (tau ) produced with associated reference beam (6) with respect to propagation time difference tau in the interferometer arms by a photodetector, calculating the spectral optical dispersion data of the mixture from the phase curve of the obtained spectral interferograms, and determining the dispersion data. The method for measuring the concentrations of individual solution components in mixtures e.g. bodily fluids with dissolved components, comprises arranging a measuring sample in a measuring arm of an interferometer, registering and then Fourier transforming interferogram G (tau ) produced with associated reference beam (6) with respect to propagation time difference tau in the interferometer arms by a photodetector, calculating the spectral optical dispersion data of the mixture from the phase curve of the obtained spectral interferograms, and determining the dispersion data using the component-specific sensitivities and ordinate sections for the computation of the component concentrations by chemo-metric partial least squares method using the relation in the given specification. The spatial position of the solution components in the mixtures is measured by low-coherent interferometry. The mixtures are aqueous solutions, non-aqueous solutions, gas mixtures or solid solutions. The low-coherent interferometer consisting of two-radiation interferometers with measuring- and reference arms and a spectrometer arranged at the interferometer exit, is arranged in the measuring arm of a Fourier domain. A field screen (71) for the perimeter on reflexes from a limited object depth range, is arranged in variable size and position before the detector array (70) of the spectrometer.