Carrier Gases - Agilent Technologies 6820 Getting Started

Carrier Gases

Getting Started
The carrier gas you use depends upon the type of detector and
the performance requirements.
capillary and packed column use.
Table 5 Carrier gas recommendations
Detector
Thermal conductivity
Flame ionization
Electron capture
Nitrogen phosphorus
* Slightly greater sensitivity than helium. Incompatible with some compounds.
† For analysis of hydrogen or helium. Greatly reduces sensitivity for other com-
pounds.
Table 5 describes gases for both
Carrier gas Comments
Helium General use
Hydrogen Maximum sensitivity
Nitrogen Hydrogen detection
Argon Maximum hydrogen
sensitivity
Nitrogen Maximum sensitivity
Helium Acceptable alternative
Nitrogen Maximum sensitivity
Argon/Methane Maximum dynamic range
Helium General use
Nitrogen Acceptable alternative
Site Preparation
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