Abstract: A method and an apparatus tier reaction loading at least one sample, comprising a loading chamber, which has a chamber air, for the sample, comprising at least one first and second saturated saline solution that, have different compositions, comprising a switching device as a function of whose switching position the loading chamber is operatively connected to the first or second saline solution in order to adapt the humidity of the chamber air in the loading chamber to the characteristic relative humidity by means of the respective saline solution, and comprising a device for influencing the humidity curve when the humidity of the chamber air in the loading chamber is being adapted to the characteristic relative humidity by means of the respective saline solution, characterized in that in addition to the respective saline solution, the device for influencing the humidity curve has a humidifier and/or dehumidifier that acts on the humidity of the chamber air.