Agilent Technologies 8860 Site Preparation Guide

7 Gas Selection and Plumbing
Gas and Reagent Selection
Site Preparation Guide 41
Table 13 lists gas recommendations for packed column use. In general, makeup gases are not
required with packed columns.
For installation checkout, Agilent requires the gas types shown in Table 14.
Thermal conductivity (TCD) Hydrogen
Helium
Nitrogen
Must be same as carrier
and reference
Must be same as carrier
and reference
Reference must be
same as carrier and
makeup
* Depending on bead type, higher makeup gas flow rates (> 5 mL/min) may introduce cooling effects or shorten bead life.
Table 12 Gases usable with Agilent GCs and capillary columns (continued)
Detector type Carrier Preferred makeup Alternate choice
Detector, anode
purge, or reference
Table 13 Gases usable with Agilent GCs and packed columns
Detector type Carrier gas Comments
Detector, anode purge, or
reference
Electron capture (ECD) Nitrogen
Argon/methane
Maximum sensitivity
Maximum dynamic range
Nitrogen
Argon/Methane
Flame ionization (FID) Nitrogen
Helium
Maximum sensitivity
Acceptable alternative
Hydrogen and air for detector.
Flame photometric (FPD) Hydrogen
Helium
Nitrogen
Argon
Hydrogen and air for detector.
Nitrogen-Phosphorus (NPD) Helium
Nitrogen
Optimum performance
Acceptable alternative
Hydrogen and air for detector.
Thermal conductivity (TCD) Helium
Hydrogen
Nitrogen
Argon
General use
Maximum sensitivity
*
Hydrogen detection
†
Maximum hydrogen sensitivity
*
Reference must be same as
carrier and makeup.
* Slightly greater sensitivity than helium. Incompatible with some compounds.
† For analysis of hydrogen or helium. Greatly reduces sensitivity for other compounds.
Table 14 Gases and reagents required for checkout
Detector Gases required
FID Carrier: helium
Makeup: nitrogen
Fuel: hydrogen
Aux gas: Air
TCD Carrier and reference: helium

Agilent Technologies 8860 Specifications

General

Brand	Agilent Technologies
Model	8860
Category	Laboratory Equipment
Language	English