Cleaning - HP 5890 Series II Plus Reference Manual

Preventive Maintenance
Flame ionization detector (FID)
Table 8-1. Available FID/NPD Jets
Part No.
18789-80070
18710-20119
19244-80560
* Measured at the jet tip.
NOTE: The 0.011-inch jet optimizes performance with capillary columns.
If used with packed columns, FID flame-out may occur with solvent peaks.
Because jet exchange requires disassembling the collector assembly from
the detector base, it is also a convenient opportunity to inspect the
detector collector and base for contaminating deposits. Proceed to the
next section to disassemble the detector, to exchange the jet, and to
perform any necessary cleaning.

Cleaning

Both the jet and the collector bore require occasional cleaning to remove
deposits (usually consisting of white silica from column bleed, or black,
carbonaceous soot). Such deposits reduce sensitivity and cause
chromatographic noise and spikes.
Jet Tip ID (inch)*
0.030
0.018
0.011
Use
Packed Column Only
(FID only: Simulated Distillation,
TCD-to-FID series operation)
Packed Column
(Standard, FID and NPD)
Capillary Column
(FID and NPD)
(FID: high sensitivity, packed column)
173