Ionization Techniques; Electron Ionization (Ei) Mode; Chemical Ionization (Ci) Mode (Optional); Xevo Tq-Gc Operation - Waters Xevo TQ-GC Overview And Maintenance Manual

• Monitoring the run
• Processing data
• Reviewing data
• Printing data
1.2.1.1 MassLynx software
MassLynx software acquires, analyzes, and manages mass spectrometry and analog data.
OpenLynx and TargetLynx XS application managers are included with MassLynx software.
See the MassLynx software user documentation and online Help for information about using
MassLynx software.
You can configure the settings, monitor performance, run diagnostic tests, and maintain the
system and its modules via the MassLynx Instrument Console application.
The Instrument Console software, which functions independently of MassLynx software, does not
recognize or control data systems.
See the online Help for the Instrument Console system for additional details.

1.3 Ionization techniques

1.3.1 Electron ionization (EI) mode

Electron ionization is a technique in which gas-phase sample molecules are ionized in collisions
with the high-energy electrons produced by a heated filament. This mechanism often fragments
the ionized molecules, producing spectral information.

1.3.2 Chemical ionization (CI) mode (optional)

When the source is operated in the Chemical ionization (CI) mode, a reagent gas is admitted into
the ion source at a relatively high pressure. The gas molecules are ionized by the electron beam
and sample ions are generated in reactions with these gas ions, typically protonation in CI+ and
electron capture in CI-. CI is a softer ionization technique than EI, producing less sample
fragmentation and, generally, a stronger molecular ion.

1.4 Xevo TQ-GC operation

The mass spectrometer operates as follows:
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
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