Hydrophilic/Phobic Tailored Multi-laned/Layer Matrix-Assisted Laser Desorption/Ionization (HTML-MALDI)

This study aimed to enhance ion yield from a protein mixture using hydrophobic and hydrophilic structured surfaces to enhance analyte solubilization and the spatial separation of matrices to enable multi-matrix desorption and ionization of the peptide mixtures. The use of solid-stated anchored compounds can aid in sample cleanup and digestion, further improving the signal intensity of digests. However, this research suggested that the results were partly dependent upon the protein's basicity. The more basic lysozyme was found to generate the highest sum peptide intensities under the dried drop methods. On the other hand, the less basic myoglobin produced the highest sum intensities with anchor support. It was critical to use the matrix species in the middle lane for optimizing analyte peak intensities, although using matrices in peripheral lanes did lead to signal enhancements.