Fpd + Gas Purity; Gas Flows; Lighting The Fpd + Flame - Agilent Technologies 7820A Advanced User's Manual

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FPD
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FPD
Lighting the FPD
Advanced User Guide
gas purity
High-purity gases have a lower sulfur content. Standard purity
gases have a higher sulfur content which impairs sulfur
detection in the compound being studied. Instrument or
Chromatographic grades work well.
Agilent recommends using helium carrier, nitrogen makeup gas,
and air with 99.9995% purity or better. Use carbon, oxygen, and
moisture traps. Select traps to remove sulfur compounds from
detector air and nitrogen gases. A helium getter is also
recommended. See the
Guide for and the Agilent web site at
more information.

gas flows

Table 20
flame, which is hydrogen-rich and oxygen-poor.
Table 20
Carrier (hydrogen, helium, nitrogen, argon)
Packed columns
Capillary columns
Detector gases
Hydrogen
Air
Carrier + makeup
Helium, either as carrier or makeup gas, may cool the detector
gases below the ignition temperature. We recommend using
nitrogen rather than helium.
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flame
Before trying to light the flame, heat the detector to operating
temperature and let it stabilize.
GC, GC/MS, and ALS Site Preparation
gives the flows for the maximum sensitivity FPD
Recommended flows
Detectors
http://www.agilent.com
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mL/min
10 to 60
1 to 5
60
60
60
5
99