Optimization of sprayer for matrix application in MALDI mass spectrometry imaging

Datasets archived as .imzML and .ibd raw files (suitable for viewing on multiple platforms - for .imzML, some examples of free software are described at https://en.wikipedia.org/wiki/Mass_spectrometry_imaging .) 1. Imaging file of sectioned spheroids coated using the converted 3D printer without optimization of application parameters (3D_printer_No_Optimization.imzml) 2. Imaging file of sectioned spheroids coated using the converted 3D printer with optimization of application parameters (3D_printer_ Optimized.imzml) 3. Imaging file of sectioned spheroids coated using the commercial sprayer with optimization of application parameters (Commercial_Printer.imzml)