Tuning the instrument for EI 3-23
General tips for tuning
A strong beam (more than 2000 counts per second in continuum) can become
saturated and distorted due to the dead time effect. Aim for 1000 counts per
second in continuum for your lock mass.
See also:
• General considerations for tuning on page G-6.
• Dead time correction on page B-49
• Effects of saturation on peak shape on page B-51.
Tip: To improve library matching, adjust the steering parameters until
the spectrum of the reference compound closely matches the library
spectrum relative intensities at low and high mass.
For example, see Figure titled “Heptacosa library spectrum:” on
page 3-23 for heptacosa and Figure titled “Tris(trifluoromethyl) triazine
library spectrum:” on page 3-24 for tri (trifluoromethyl) triazine.
Heptacosa library spectrum:
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