A magazine device (14) and method are provided for a measuring device (12) for measuring a concentration of gaseous and/or aerosol components of a gas mixture. The magazine device (14) includes a holding device (16) for a plurality of reaction carriers (18), which have each at least one reaction chamber with a reactant. The reactant is designed to react with a particular component to be measured in the gas mixture or with a reaction product of the component to be measured in an optically detectable manner. A feed device (20) removes a reaction carrier (18) of the plurality of reaction carriers (18) from the holding device (16) and feed the reaction carrier to the measuring device (12) for carrying out a measurement of the particular component to be measured in the gas mixture. A control unit (22) controls the holding device (16) and/or the feed device (20).