Sample Inlets; Gc Interface - Waters Xevo TQ-GC Overview And Maintenance Manual

Table 1–2: Carrier gas (connects to the GC oven)
Carrier gas
Helium
Hydrogen
Nitrogen
Table 1–3: Chemical ionization gas (connects to the back of the instrument)
Chemical ionization
gas
Ammonia
Argon
Isobutane
Methane

1.7 Sample inlets

1.7.1 GC interface

The GC interface is a heated transfer line that connects the GC oven to the ion source and
ensures that there are no cold zones between these two sections of the system. The heated
interface prevents the sample from condensing in the GC column before it reaches the ion
source, which would reduce chromatographic peak quality.
Ionization mode
EI or CI
Ionization mode
CI only
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
Requirements
Dry and of high purity
(99.997%)
Requirements
Dry and of high purity
(99.997%)
Page 28
Regulated pressure
setting
8 bar (116 psi, 800
kPa)
8-10 bar (116-145 psi,
800-1,000 kPa)
8 bar (116 psi, 800
kPa)
Regulated pressure
setting
1.0 bar (14.5 psi, 100
kPa)