Research Article

On the Primary Ionization Mechanism(s) in Matrix-Assisted Laser Desorption Ionization

Figure 5

MALDI mass spectra of Human Serum Albumin obtained by (a) sinapinic acid only, (b) sinapinic acid with 0.1% of formic acid, (c) sinapinic acid with 0.1% of acetic acid, and (d) sinapinic acid with 0.1% of trifluoroacetic acid.
161865.fig.005a
(a)
161865.fig.005b
(b)
161865.fig.005c
(c)
161865.fig.005d
(d)