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The CI Parameters
CI Auto
Reagent Gas
Item Description
Reagent Gas
Select CI reagent for application. Select User-Defined for
gas not listed.
CI Storage level
Value of the smallest mass stored in the ion trap during the
ionization and reaction period of the reagent gas. Values
from 5 to 150 m/z.
Ejection
Amplitude (v)
This voltage actively ejects unwanted ions (i.e., not reagent
ions) that are produced during the ionization stage of the CI
scan function. When this value is set to 0, active ejection is
disabled.
Background mass
The mass value that is greater than or equal to the mass of
the largest reagent ion produced by the selected reagent
gas. Values from 10 to 300 m/z.
Target TIC Value
Target TIC value determines how many ions are allowed in
the ion trap. CI uses a portion of the ions detected during
the previous analytical scan to calculate the ionization and
reaction times for the next analytical scan. Values from 10
to 30000.
Maximum ionization
time
Maximum time that energetic electrons, emitted from the
filament, are allowed to interact with reagent gas molecules
to form reagent ions. In CI, the maximum ionization time can
be set to any value from 10 to 2500 sec.
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