Method for detecting at least one analyte in a sample

A sample preparation system, wherein the sample preparation system comprises:

• at least one vessel, wherein the vessel is configured for providing at least one sample having at least one analyte;
• at least one liquid handling system, wherein the liquid handling system is configured for adding microparticles to the vessel whereby the analyte is adsorbed on a surface of the microparticles and an analyte-microparticle-complex is formed;
• at least one holder, wherein the holder is configured for holding at least one fiber sheet material having at least one tip, wherein the holder is further configured for contacting the tip of the fiber sheet material to the sample comprising the analyte-microparticle-complex;
• at least one analytical device, wherein the analytical device is configured for detecting the at least one analyte, wherein the analytical device comprises at least one port;
• at least one sample changer, wherein the sample changer is configured for transferring the holder holding the fiber sheet material to the port of the analytical device, such that the tip of the fiber sheet material is in contact with the port;
• at least one electrical contact, wherein the electrical contact is configured for applying an electrical voltage to the fiber sheet material;
• and
• at least one extracting solvent supply, wherein the extracting solvent supply is configured for wetting the fiber sheet material with at least one extracting solvent.