Preventive Maintenance
Flame ionization detector (FID)
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Metal inserts and/or liners
Do not use concentrated acid(s) on metal inserts or liners!
The insert is washed with noncorrosive solvents (H O, CH OH
(methanol), (CH
) CO (acetone), CH Cl (methylene chloride), etc),
and then dried thoroughly in an oven at 105
C.
After washing and drying, a suitable wire may be used to dislodge
solids from interior surfaces, followed by compressed, filtered, dry air
or N
to blow any loose material out of the insert or liner.
For any of the inserts used with the dedicated on•columncapillary
inlet, use a stainless steel cleaning wire (Part No. 19245•20570;
0.007•inch(0.2 mm) od, 1.5•inch(3.8 cm) long, package of 4) to
dislodge solid material.
Flame ionization detector (FID)
In addition to the detector itself, other systems associated with the
detector may also require routine maintenance.
Flame ionization detectors use H
2
gas as fuel. If H
2
flow is on, and no
column is connected to the detector inlet fitting, H
2
gas can flow into
the oven and create an explosion hazard. Inlet fittings must have
either a column or a cap connected at all times.
WARNING
