Patent ID: 8372655

Claim:
A method of identifying an analyte, comprising: (a) providing a plate for mass spectrometry comprising a support and a polyvinylidene difluoride coating adhering thereto, wherein the plate for mass spectrometry is prepared by the following steps: (i) providing a support and (ii) depositing polyvinylidene difluoride molecules in dispersion on the support, thereby forming a polyvinylidene difluoride coating on the support, (b) subjecting an analyte-containing sample to gel electrophoresis, thereby forming a gel containing the analyte, (c) blotting the gel containing the analyte to the plate to transfer the analyte to the plate, (d) contacting the plate with a sample containing a substance that has affinity for the transferred analyte to form a complex of the transferred analyte and the substance on the plate, (e) adding a matrix for mass spectrometry to the plate, and (f) subjecting the plate to mass spectrometry to simultaneously analyze the transferred analyte and the substance.