Automated analyser for determining nitrogen content of organic compounds

An automated analyser is described for determining, by way of combustion, nitrogen contained in organic compounds, in particular proteins present in foods, animal feeds, polymers, fuels etc., characterised in that the carbon dioxide absorption device upstream of the nitrogen detector is self-regenerating and comprises: a distributor valve able to switch different gas circuits without contaminations and losses from one gas sample to another, a carousel consisting of a plurality of absorber elements inside which is placed an adsorbent material, a furnace suitable for said adsorbers, in such a manner that each of said adsorbers presents itself in turn for each analysis and that on completion of said analysis the same adsorber is conveyed to the furnace for degassing of the absorbent material and thus for its relative regeneration.