Introduction 1
The 7200 Accurate-Mass Quadrupole Time-of-Flight GC/MS System
Operation Manual 13
The basic components of the instrument are: the frame/cover
assemblies, the vacuum system, the GC/MS interface, the
removable ion source, the flight tube electronics, the
quadrupole mass filter, the collision cell, and the detector.
Vacuum gauge
The 7200 Q-TOF GC/MS is equipped with four ion vacuum
gauges. The MassHunter Workstation can be used to read the
pressure (high vacuum) in the vacuum manifold, the
turbomolecular vacuum pump discharge, and the flight tube.
Ionization modes
The 7200 Accurate-Mass Q-TOF GC/MS can be purchased in two
different ionization configurations:
• G3850AA 7200 Q-TOF GC/MS EI RIS Bundle
• G3851AA 7200 Q-TOF GC/MS EI/CI RIS Bundle
An upgrade kit is available, which allows the user to bring an EI
system to an EI/CI system. This kit adds to the 7200 Q-TOF
GC/MS:
• CI ion source
• Reagent gas flow control module plus associated tubing and
cabeling
• Utilities panel update
• New ribs for cover support
• New routing for the IRM assembly
For the CI system, a methane/isobutane gas purifier is provided
and is required. It removes oxygen, water, hydrocarbons, and
sulfur compounds.
The MS CI system has been optimized to achieve the relatively
high ion source pressure required for CI while still maintaining
high vacuum in the collision cell, quadrupole, and TOF tube.
Special seals along the flow path of the reagent gas and very
small openings in the ion source keep the ion source gases in
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