Evaporation apparatus and method

1. An evaporation apparatus, comprising:

at least one manifold with at least one nozzle;

a tank unit for a liquid,

a sample holder configured to be inserted into the tank unit, wherein the sample holder is configured to hold at least one sample in a defined position relative to the at least one nozzle;

an inlet port configured to be connected to a gas supply;

a pressure regulator arranged downstream of the inlet port, wherein a set value of the pressure regulator is controlled by an electronic control unit;

a control valve arranged downstream of the pressure regulator, wherein each of the at least one manifold is connected to a corresponding output port of the control valve, which control valve is controlled by the electronic control unit; and

the electronic control unit configured to set the set value of the pressure regulator to a value that causes a predetermined gas flow that gradually increases from each of the at least one nozzle.

2. An evaporator apparatus according to claim 1 , wherein the set value of the pressure regulator depends on the number of connected manifolds connected to the control valve and the predetermined gas flow from the at least one nozzle.

3. An evaporator apparatus according to claim 1 , wherein the electronic control unit is configured to gradually increase the gas flow from a first low pressure to the set value.

4. An evaporator apparatus according to claim 1 , wherein each manifold is adjustable, in a longitudinal direction, by means of a handle.

5. An evaporator apparatus according to claim 1 , wherein the sample holder comprises:

a test tube rack comprising a compartment for a test tube which comprises an opening configured to receive the test tube; and

a lever configured for:

an unloaded position in which the lever extends into the compartment; and

a loaded position in which the lever presses a sidewall of the test tube against a part of the opening.

6. An evaporator apparatus according to claim 5 , wherein the test tube rack comprises:

an upper structure comprising the opening configured to receive the test tube, wherein the lever is operatively connected to the upper structure and extends downwardly and at least partly into the compartment;

a middle structure comprising a second opening configured to receive the test tube, the middle structure further comprises a guide structure configured to guide the test tube through the second opening during insertion.

7. An evaporator apparatus according to claim 5 , wherein the test tube rack comprises an adjustable structure arranged below an upper structure and a middle structure, which the adjustable structured is vertically adjustable in order to allow test tubes of different lengths to be used in the test tube rack.

8. An evaporator apparatus according to claim 5 , wherein the opening comprises sidewalls with an intermediate angle θ.

9. An evaporator apparatus according to claim 8 , wherein the intermediate angle θ is in an interval from 90° to 130°.

10. An evaporator apparatus according to claim 5 , wherein the lever is made of a plastic material.

11. A method for evaporating a solvent, wherein an evaporator apparatus according to claim 1 is used.