Inlet Liners For Use With The Fpd; Fpd Temperature Considerations; Fpd Gas Purity; Fpd Gas Flows - Agilent Technologies 7890 Series Advanced Operation Manual

5
Detectors

Inlet liners for use with the FPD

FPD temperature considerations

FPD gas purity

FPD gas flows

208
The phosphorus filter is yellow/green and transmits at
525 nanometers.
Compounds containing sulfur may adsorb on an inlet liner
and degrade the GC's performance. Use deactivated, clean
liners or a cool on- column inlet, which injects directly onto
the column.
For best results with splitless injection, use liner 5181- 3316.
The minimum detector temperature to prevent water
condensation is 120 °C. We recommend a temperature that
is 25 °C higher than the highest column temperature, but no
higher than 250 °C.
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
Site Preparation Guide
http://www.agilent.com
Table 53 gives the flows for the maximum sensitivity FPD
flame, which is hydrogen- rich and oxygen- poor.
Table 54 Recommended flows
Carrier (hydrogen, helium, nitrogen, argon)
Packed columns
Capillary columns
GC, GC/MS, and ALS
for and the Agilent web site at
more information.
Sulfur mode flows, Phosphorus mode
mL/min flows, mL/min
10 to 60 10 to 60
1 to 5 1 to 5
Advanced Operation Manual