SAMPLE PREPARATION FOR MALDI-TOF
The present disclosure relates to a device for preparing, in an automated manner, at least one sample for analysis by means of matrix-assisted laser desorption ionization in combination with a mass spectrometric analysis, and to a corresponding method. The device comprises a sample-receiving area which is surrounded by a housing and forms an internal volume which is closed off from the surroundings, a loading/unloading device for introducing the sample into the sample-receiving area and for removing the sample from the sample-receiving area, a heating unit configured to heat at least the sample-receiving area, and a vacuum device configured to generate a vacuum in the sample-receiving area.
1 . A device for preparing a sample for analysis by matrix-assisted laser desorption ionization in combination with a mass spectrometric analysis, the device comprising:
a sample-receiving area surrounded by a housing and defining an internal volume closed off from the surroundings;
a loading/unloading device configured to enable introducing the sample into the sample-receiving area and removing the sample from the sample-receiving area;
a heating unit configured to heat at least the sample-receiving area; and
a vacuum device configured to generate a vacuum in the sample-receiving area.
2 . The device of claim 1 , wherein the heating unit is attached to the housing or introduced into the housing, and wherein the heating unit id configured to heat the sample-receiving area via the housing.
3 . The device of claim 1 , further comprising a temperature sensor configured to determine a temperature of the housing, the sample-receiving area or the sample.
4 . The device of claim 1 , further comprising a pressure sensor configured to determine a pressure in the sample-receiving area.
5 . The device of claim 1 , wherein the loading/unloading device is configured to convey the sample from outside into the sample-receiving area and to convey the sample from the sample-receiving area.
6 . The device of claim 1 , further comprising a cover configured to seal the sample-receiving area from the surroundings when the sample is disposed in the sample-receiving area.
7 . The device of claim 1 , wherein the device is configured to introduce the sample into the sample-receiving area in an automated manner after positioning in the loading/unloading device.
8 . The device of claim 1 , wherein the device is configured to remove the sample in an automated manner from the sample-receiving area using the loading/unloading device after a predetermined time interval in the sample-receiving area.
9 . A method for preparing in an automated manner a sample for analysis by matrix-assisted laser desorption ionization in combination with a mass spectrometric analysis, the method comprising:
providing a device comprising:
a sample-receiving area surrounded by a housing and defining an internal volume closed off from the surroundings;
a loading/unloading device configured to enable introducing the sample into the sample-receiving area and removing the sample from the sample-receiving area;
a heating unit configured to heat at least the sample-receiving area; and
a vacuum device configured to generate a vacuum in the sample-receiving area;
introducing the sample into the sample-receiving area;
during a predetermined time interval, heating the sample-receiving area surrounding the sample with the heating unit; and
during the time interval, generating a vacuum in the sample-receiving area.
10 . The method of claim 9 , further comprising generating a predetermined pressure in the sample-receiving area.
11 . The method of claim 9 , wherein the sample-receiving area is heated to a predetermined temperature, or wherein the sample-receiving area is heated with a predetermined heating power of the heating unit.
12 . The method of claim 11 , wherein the predetermined temperature is selected as a function of one or more of the sample, a material of the sample, a material of a matrix in which the sample is embedded, a quantity of the sample, a quantity of the matrix and a predetermined pressure in the sample-receiving area.
13 . The method of claim 11 , wherein the time interval is selected as a function of one or more of the sample, a material of the sample, a material of a matrix in which the sample is embedded, a quantity of the sample, a quantity of the matrix, a predetermined pressure in the sample-receiving area and the predetermined temperature.
14 . The method of claim 9 , wherein the time interval is selected as a function of a time curve of a pressure in the sample-receiving area.
15 . The method of claim 14 , wherein an end time point of the time interval is selected such that a change in the pressure over time falls below a predetermined limit value at the end time point.
16 . The method of claim 14 , wherein an end time point of the time interval is selected such that the pressure is substantially constant as a function of the time at the end time point.