Thermo Scientific TSQ Series Hardware Manual page 57

Ions enter the Q2 collision cell, collide with the argon collision gas, and then, because of the
collision, dissociate into smaller fragments. See
Argon (135 ± 70 kPa [20 ± 10 psi], 99.995% minimum purity) enters the mass spectrometer
through a 1/8-in. port on the left side of the mass spectrometer. See
A second proportional valve allows the forepump to evacuate the Q2 collision cell of argon and
waste gasses when CID is turned off. The TSQ mass spectrometer automatically opens and closes
the collision gas evacuation valve, depending on whether Q2 is acting as an ion transmission device
or a collision cell.
Sheath Gas Valve
The sheath gas valve controls the flow of sheath gas (nitrogen) into the API source. Dry nitrogen
(690 ± 140 kPa [100 ± 20 psi], 99% purity) enters the mass spectrometer through a 1/4-in. port
on the left side of the mass spectrometer. See
the flow of nitrogen to the API source. The data system controls a valve that regulates the sheath
gas pressure. You can set the sheath gas flow rate (20 to 100 in arbitrary units) in the H-ESI Source
and APCI Source dialog boxes from the Tune Master window. The sheath gas enters the API
source through 1/8-in. ID tubing.
Auxiliary Gas Valve
The auxiliary gas valve controls the flow of auxiliary gas (nitrogen) into the API source.
Dry nitrogen (690 ± 140 kPa [100 ± 20 psi], 99% purity) enters the mass spectrometer through a
1/4-in. port on the left side of the mass spectrometer. A solenoid shutoff valve starts and stops the
flow of nitrogen to the API source. The auxiliary gas pressure is regulated by a flow valve that is
controlled by the data system. You can set the auxiliary gas flow rate (0 to 60 in arbitrary units) in
the H-ESI Source and APCI Source dialog boxes. The auxiliary gas enters the API source through
1/8-in. ID tubing.
Figure 32. Nitrogen and argon gas inlets
Nitrogen for Vent
35 kPa MAX
(5 psi MAX)
Argon In
135 ± 70 kPa
(20 ± 10 psi)
Thermo Scientific
"Collision Cell and CID Efficiency"
Figure 32. A solenoid shutoff valve starts and stops
Nitrogen In
690 ± 140 kPa
(100 ± 20 psi)
2
Functional Description
Mass Spectrometer
on page
Figure 32.
TSQ Series Hardware Manual
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