Fig. 21 The spectra of DHB, DAN and norharmane matrix
Considering quite similar performance of different matrices in positive
ionization mode, in our opinion DHB matrix could be chosen as the first
selection (see Fig. 21). Norharmane matrix could be rejected since it
changes the ion map – probably as a result of the solvent properties.
As it was noted, for several m/z values, we obtained different ion maps
in comparison with DHB matrix. Generally, DHB matrix gives higher peaks
intensity and s/n ratio. Thus, for the measurement of lipids in the
positive ion mode, we recommended this matrix.