Agilent Technologies 7200 Operation Manual page 71

Agilent 7200 Accurate-Mass Quadrupole Time-of-Flight GC/MS System
Operation Manual
4
Operating in Chemical Ionization (CI)
Mode
Setting Up Your MS to Operate in CI Mode
The CI GC/MS Interface
Operating the CI MS 75
High Vacuum Pressure in CI Mode
Other Reagent Gases 78
CI Autotune 80
The Flow Control Module
To Switch from the EI Mode to CI Mode
To Operate the Reagent Gas Flow Control Module
To Set a Reagent Gas Flow
To Perform a CI Autotune
This chapter provides information and instructions for
operating the 7200 QTOF GC/MS system in Chemical Ionization
(CI) mode. Most of the information in the preceding chapter is
also relevant.
Most of the material is related to methane chemical ionization
but one section discusses the use of other reagent gases.
The software contains instructions for setting the reagent gas
flow and for performing CI autotunes. Autotunes are provided
for positive CI (PCI) with methane reagent gas and for negative
CI (NCI) with any reagent gas.
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