
Chapter 6 Acquiring Mass Spectra
6-22 PerSeptive Biosystems
6
Figure 6-8 Example of Poor Mass Spectrum for Angiotensin
Figure 6-9 Example of Good Mass Spectrum for Angiotensin
High laser power causing the following:
Matrix peaks and sample saturated
Broad peak
Poor resolution
Mass is
accurate
Minor components
or fragments of major
components ionized
Signal is
saturated
Baseline noise
Peak not saturated
Sharp, narrow peak
resolved to isotopes
Matrix peaks minimized
No minor
components
or fragments
Lower laser power producing:
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