Npd Flow, Temperature, And Bead Recommendations - Agilent Technologies 7890 Series Advanced Operation Manual

H
2
Frit
Valve
PS
Restrictor
PS = Pressure Sensor

NPD flow, temperature, and bead recommendations

Advanced Operation Manual
minimizing hydrocarbon ionization, while the alkali ions on the
bead surface facilitate ionization of nitrogen- or
phosphorus- organic compounds. The output current is
proportional to the number of ions collected. It is sensed by an
electrometer, converted to digital form, and sent to an output
device.
Makeup Air
Frit Frit
Valve Valve
PS
Restrictor
Table 49
Gas or Setting
Carrier gas (helium, hydrogen, nitrogen) Capillary, choose optimum flow
Detector gases
Hydrogen
Air
EPC Module
PS
Restrictor
General operating values
Detectors
Vent
Electrically
heated bead
Column
Recommendation
based on column dimensions.
Ceramic bead
2 to 5 mL/min
Blos bead
1 to 3 mL/min
60 mL/min
5
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