Discrimination of Lipids in Heart Tissue using DESI HRMS MSI

Mass Spectrometric Imaging (MSI) using DESI provides molecular imaging without the interference of the matrix required for MALDI and offers the advantage of preserving sample for further analysis. DESI coupled to High Resolution Accurate Mass (HRAM), is shown here to elucidate spatial distribution of lipids, protein, and metabolites in tissue sections and can provide confident and discriminate biomarker determinations.