Patent ID: 8578755

Claim:
An apparatus comprising: a device for providing gases for analysis, the device having a first gas path for a gas stream, a second gas path, and a first reactor located between the first and second gas paths, the first reactor having an inlet side facing the first gas path and an outlet side, the device further having a second reactor; and at least one switching device that is switchable between first and second states, wherein switching the switching device to the first or second state selects gases that have passed through a respective one of the first or second reactors to flow to an isotope ratio analyzer arranged downstream of the device; wherein the second reactor is arranged parallel to the first reactor, downstream of the first gas path, and wherein the at least one switching device is configured and arranged such that the gas stream coming from the first gas path, or a main part thereof, passes into the first reactor or into the second reactor; wherein a first switching device for switching over the gas stream is provided in such a way that the gas stream coming from the first gas path, or a main part thereof, passes into the first reactor by way of the inlet side thereof or into the second reactor by way of an inlet side thereof; wherein the first switching device is provided between the second gas path and the outlet sides of the first and second reactors.