Agilent Technologies 7820A GC Site Preparation Guide

16 7820A GC Site Preparation Guide
1 7820A GC Site Preparation
Agilent recommends that carrier and detector gases be
99.9995% pure. See Table 8. Air needs to be zero grade or better.
Agilent also recommends using high quality traps to remove
hydrocarbons, water, and oxygen.
For installation checkout, Agilent requires the gas types shown
in Table 9.
Thermal conductivity (TCD) Helium
Hydrogen
Nitrogen
Argon
General use
Maximum sensitivity
*
Hydrogen detection
†
Maximum hydrogen
sensitivity
1
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 7 Gases usable with Agilent GCs and packed columns (continued)
Detector type Carrier gas Comments Detector, anode purge, or
reference
Table 8 Carrier gas purity
Carrier gas requirements Purity Notes
Helium (carrier) 99.9995% Hydrocarbon free
Hydrogen (carrier) 99.9995% SFC grade
Nitrogen (carrier) 99.9995%
Table 9 Gases required for checkout
Detector Gases required
FID Carrier: helium
Makeup: nitrogen
Fuel: hydrogen
Aux gas: Air
TCD Carrier and reference: helium
NPD Carrier: helium
Makeup: nitrogen
Fuel: hydrogen
Aux gas: Air
uECD Carrier: helium
Anode purge and makeup: nitrogen

Agilent Technologies 7820A GC Specifications

General

Brand	Agilent Technologies
Model	7820A GC
Category	Watch
Language	English