Method for filter selection of binary configured for determining smallest concentration changes in substance mixtures is provided wherein one or a plurality of low-concentration lead components can be reliably detected in the presence of higher-concentration matrix or background components using the selected broad-band binary filters. The spectral power transmitted or reflected by the substance mixture is detected by a plurality of photosensitive detectors which are spectrally broad-banded and provided with binary filters, the detector signals being used for exact determination of the substance concentrations.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a National Phase filing under 35 U.S.C. .sctn.371 of PCT/EP01/03934, filed Apr. 6, 2001, which claims priority to DE 100 18 941.5, filed Apr. 17, 2000 and to DE 100 18 940.7, filed Apr. 17, 2002, all of which are incorporated herein by reference.
