Fig. 2. The effect on the MALDI spectra of an applied electric field applied at three different stages of the matrix spray coating process. (a) Experiment design of electric field applied at different steps of the matrix spray coating. (b) H&E stained image of a representative rat brain tissue section. (c) Four mass spectra corresponding to experiments I to IV (a), acquired from the same hippocampus region of the four rat brain tissue sections and using a completely same set of MS operating and data acquisition parameters. The matrix-related ions are labeled “▲”.
