Gas And Reagent Selection - Agilent Technologies ALS Handbuch

7890 Series GC Site Preparation

Gas and Reagent Selection

Table 7
with capillary columns, GC detectors require a separate makeup gas for
optimum sensitivity. The MS and MSD use GC carrier gas.
If using any MS system, use of hydrogen as the carrier gas may require
hardware modifications for best performance. Contact your Agilent service
representative. Hydrogen is not supported as a carrier gas with the 7200/7250
GC/Q-TOF system.
Nitrogen and Argon/Methane are generally not suitable for GC/MS carrier gas.
N O T E
Table 7 Gases usable with Agilent GCs and capillary columns
Detector type
Electron capture (ECD)
Flame ionization (FID)
Flame photometric (FPD)
Nitrogen-Phosphorus
(NPD)
Thermal conductivity
(TCD)
1 Depending on bead type, higher makeup gas flow rates (> 5 mL/min) may introduce cooling effects or shorten bead life.
30
lists gases usable with Agilent GCs and capillary columns. When used
Carrier Preferred makeup
Hydrogen Nitrogen
Helium
Nitrogen
Argon/Methane (5%)
Hydrogen Nitrogen
Helium Nitrogen
Nitrogen Nitrogen
Hydrogen Nitrogen
Helium Nitrogen
Nitrogen Nitrogen
Argon Nitrogen
Helium Nitrogen
Nitrogen Nitrogen
Hydrogen Must be same as
Helium carrier and reference
Nitrogen
Alternate choice
Nitrogen
Nitrogen
Argon/Methane (5%)
Nitrogen
Helium
Helium
Helium
1
Helium
Helium
Must be same as
carrier and reference
GC, GC/MS, and ALS Site Preparation Guide
Detector, anode
purge, or reference
Anode purge must
be same as makeup
Hydrogen and air for
detector
Hydrogen and air for
detector
Hydrogen and air for
detector
Reference must be
same as carrier and
makeup