A method for detecting a plurality of substances of a gas mixture by means of a temporally successive determination of individual concentrations of the substances
2009
The invention relates to a method and an apparatus for detecting a plurality of substances of a gas mixture by means of a temporally successive determination of individual concentrations of the substances by using a single measuring arrangement with the aid of the photoacoustic spectroscopy. Here, at least two selectively activatable radiation sources and / or radiation generated by filtering a signal outputted from at least one radiation source radiation spectrum used in the invention.
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