Figure 5.
Examples of DESI mass spectra. (A) DESI mass spectrum of 100 pg (total amount deposited on surface) of melittin (M) (molecular mass 2847 Da) deposited on a polyvinylidene difluoride (PVDF) surface. (B) DESI mass spectrum of 1 pmol of cyctochrome c (C) (from equine heart) on a PTFE surface. Methanol:H2O (1:1) was used as the spray solvent at a flow rate of 5 μL/min. (m/z) Mass-to-charge ratio. For more details, see Desorption Electrospray Ionization (DESI) Analysis of Intact Proteins/Oligopeptides. (Reprinted with permission, © 2007 Scion Publishing Ltd.)
