Agilent Technologies ALS Handbuch Seite 42

7890 Series GC Site Preparation
Table 22
source pressures.
Table 22 7200/7250 Q-TOF GC/MS carrier and reagent gas flows
Carrier and reagent gas requirements
Helium (required for carrier and IRM)
Nitrogen for RIS transfer line actuator
Nitrogen for collision cell (nitrogen source is
supplied to EPC module in GC.)
Helium for collision cell (helium source is
supplied to EPC module in GC.)
The use of hydrogen is specifically prohibited with the 7200/7250 GC/Q-TOF.
WA R N I N G
GC/MS systems with a JetClean ion source system installed use helium as the
GC carrier gas and an additional supply of hydrogen gas to the MS analyzer.
Table 23
reflect the pressures supplied to the instruments, not setpoints.
Table 23
Gas supply
Helium
Hydrogen
1 Any delivery pressure ≤ 621 kPa (90 psi) is acceptable as long as it is 69 kPa (10 psi) higher than the
42
lists typical flows resulting from selected carrier and reagent gas
Q-TOF
7200
7200
7200/7250
7250
shows typical supply pressures needed for operation. These values
JetClean ion source system gas supply pressures
maximum hydrogen pressure needed during operation.
Typical pressure range
173 to 207 kPa
(25 to 30 psi)
6.1 to 6.8 bar
(612 to 690 kPa, or
(90 to 100 psi)
0.7 to 2.0 bar
(70 to 207 kPa, or
10 to 30 psi)
0.7 to 2.0 bar
(70 to 207 kPa, or
10 to 30 psi)
Pressure delivered at the GC
690 kPa (100 psi)
≤ 621 kPa (90 psi) 1
GC, GC/MS, and ALS Site Preparation Guide
Typical flow
1.0 to 2.0 (mL/min)
Up to 30 L/min
1 to 2 (mL/min)
4 (mL/min)