15
Calibrating the MS
Calibrating and Tuning the MS
64 TSQ Altis, Quantis, and Fortis Hardware Manual Thermo Scientific
Calibration Solution Peak Values
The mass spectra of the EMRS in positive and negative ion polarity modes (Figure 32 and
Figure 33, respectively) have peaks at m/z values close to the following theoretical values.
Figure 32. Mass spectrum of EMRS in positive ion mode
Positive mode (m/z) Negative mode (m/z)
69 69
102 113
215 302
622 602
922 1034
1522 1634
IMPORTANT If you observe interfering peaks in the EMRS spectrum that are within
±10 Da of any of these calibration masses, follow the procedure “Flushing the Inlet
Components,” on page 47. Ensure that the interfering masses show less than 25 percent
of the intensity of the calibrant ions.
2
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