Voyager DP-263-S Guía de usuario Pagina 333

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Obtaining Good Spectra in Delayed Extraction Mode
Voyager
Biospectrometry
Workstation User’s Guide 6-21
6
Figure 6-6 Example of Poor Mass Spectrum for Myoglobin Using Sinapinic Acid
Figure 6-7 Example of Good Mass Spectrum for Myoglobin Using Sinapinic Acid
High laser power causing the following:
noise
Mass is fairly
accurate
Dimer
Poor separation
between molecular
ion and matrix
adduct ion
Signal near
saturation
point
Baseline
Lower laser power producing:
Minimal
noise
Good separation
between molecular
ion and matrix
adduct ion
Resolved
to over 1,000
resolution
Dimer
minimized
Correct intensity ratio
between singly-charged ion
[M+H]
+
and double-charged
ion [M+2H]
2+
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