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Item Description
Maximum reaction
time
Maximum time that reagent gas ions are allowed to react
with sample molecules to form ions. The maximum reaction
time can be set to any value from 1 to 128 milliseconds.
Prescan Ionization
Time
Ionization time of the prescan uses in MS/MS. This is
normally set to 200 sec for CI.
CI Fixed Parameters
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. Range 0 to 65.0 volts
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.
Ionization Time
Fixed time CI reagent ions are formed. Values from 10 to
2000 sec.
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.
Maximum reaction
time
Maximum time that reagent gas ions are allowed to react
with sample molecules to form ions. The maximum reaction
time can be set to any value from 1 to 128 milliseconds.
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