Abstract: An adsorption device for adsorption of CO2 for an elemental analyzer includes a filter having an inlet for a fluid, an outlet for the fluid, and an adsorbent material through which the fluid can flow, and a heating device for heating the adsorbent material. The adsorption device is characterized in that the heating device extends along a longitudinal axis and the filter is arranged coaxially with the longitudinal axis and at least partially radially surrounds the heating device. In addition, an elemental analyzer includes a combustion reactor for burning a sample, an optional reduction reactor, an optional water separator, and a detector. The elemental analyzer further includes the adsorption device for adsorbing CO2 and a valve control for alternately passing an analysis fluid from the combustion reactor through the adsorption device for adsorbing CO2 and to the detector, or a flushing fluid through the adsorption device for adsorbing CO2.

Abstract: The present disclosure relates to a valve device for an elemental analyzer including a first and a second ring line. The first and the second ring line each have an inlet and a plurality of outlets, each outlet being provided with a check valve, and the check valves being openable independently of each other. The present disclosure further relates to an adsorption device for an elemental analyzer. The adsorption device includes a first valve device and a plurality of filter units, each filter unit having an inlet and an outlet, and the filter units being connected to the first valve device such that each filter unit is connected via its inlet to a respective outlet of the first ring line and an outlet of the second ring line of the first valve device. The invention also relates to a method of operating an adsorption device for an elemental analyzer.