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Gas Type Suggested Flow
for Sulfur
Suggested Flow
for Phosphorus
Carrier gas
(hydrogen, helium, nitrogen, argon)
Packed columns 10 to 60 mL/min 10 to 60 mL/min
Capillary columns 1 to 5 mL/min 1 to 5 mL/min
Detector gases
Hydrogen 50 mL/min 150 mL/min
Air 60 mL/min 110 mL/min
Carrier + makeup 60 mL/min 60 mL/min
Supply pressure: Air supply pressure must be at least 90 psi for the ignition sequence.
All others, adequate to achieve desired flows.
Detector Temperature
Below 120°C, flame will not light
Set temperature about 25°C higher than highest oven temperatureĊlimit is 250°C.
Lit offsetą[Config] [Front Det] or [Back Det]
If the detector output with the flame on minus the output when the flame is off falls below
this value, the FPD attempts to reĆignite twice. If output does not increase by at least this
much, the detector shuts down.
The recommended setting is 2.0 pA.
A setting of 0 or [Off] disables autoignition.
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