Agilent Technologies ALS Handbuch Seite 31

Table 8
gases are not required with packed columns.
Table 8 Gases usable with Agilent GCs and packed columns
Detector type
Electron capture (ECD)
Flame ionization (FID)
Flame photometric (FPD)
Nitrogen-Phosphorus (NPD)
Thermal conductivity (TCD)
1 Slightly greater sensitivity than helium. Incompatible with some compounds.
2 For analysis of hydrogen or helium. Greatly reduces sensitivity for other compounds.
For installation checkout, Agilent requires the gas types shown in
GC, GC/MS, and ALS Site Preparation Guide
lists gas recommendations for packed column use. In general, makeup
Carrier gas
Nitrogen
Argon/methane
Nitrogen
Helium
Hydrogen
Helium
Nitrogen
Argon
Helium
Nitrogen
Helium
Hydrogen
Nitrogen
Argon
7890 Series GC Site Preparation
Comments
Maximum sensitivity
Maximum dynamic range
Maximum sensitivity
Acceptable alternative
Optimum performance
Acceptable alternative
General use
1
Maximum sensitivity
2
Hydrogen detection
Maximum hydrogen
1
sensitivity
Detector, anode purge, or
reference
Nitrogen
Argon/Methane
Hydrogen and air for
detector.
Hydrogen and air for
detector.
Hydrogen and air for
detector.
Reference must be same
as carrier and makeup.
Table 9.
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