Fig. 8 The relationship between the chosen peaks’ intensities
and signal-to-noise ratio (s/n) in terms of the number of matrix layers
(A) and the spraying nozzle height (B) for the positive ionization mode
rat spinal cord tissue slices (matrix: 2.5 mg/ml DAN 50% ACN)
Here we also observe discrepancies between ion maps produced by
different matrices (see: discussion).
The number of layers and the spraying nozzle height –
negative ionization mode (9AA, norharmane, NEDC and DAN matrices)
9-Aminoacridine (9AA 7 mg/ml 70% EtOH)) – negative
ionization mode
Four different numbers of matrix layers (l= 10, 12, 14, 16) and four
different positions of spraying nozzle height (Z=25, 15, 5, 1) were
tested for 9AA as a reference matrix in the negative ionization mode. As
previously, the peaks intensities and the s/n ratios were compared.