Cleaning An Fid Jet And Collector; Cleaning The Collector; Cleaning The Jet - Agilent Technologies 6890 Series Service Manual

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Cleaning an FID jet and collector

Both the jet and 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

Turn off the detector and its heated zone; also turn off gases to the detector

(particularly hydrogen). Allow time for the detector zone to cool.

Remove the collector as described in this chapter.

Use a cleaning brush (part no. 8710-1346) to scrub the interior of the

Use compressed air or nitrogen to blow out loose material from inside

the collector.

Wash the collector in distilled water, hexane and/or methanol. Dry in an

oven at 70° C for at least 1/2-hour.

Turn off the detector and its heated zone; also turn off gases to the detector

(particularly hydrogen). Allow time for the detector zone to cool.

Remove the jet as described in this chapter.

Use a cleaning wire (0.016-inch od, 12 inch length, part no. 18765-20070)

to loosen/remove internal deposits.

Wash both the internal bore and exterior of the jet with a 1:1 (V/V)

solution of methanol and acetone.

Clean the detector base cavity using solvents, a swab and compressed air

or nitrogen.

Agilent 6890 Gas Chromatograph Service Manual

Flame Ionization Detector (FID)

Cleaning an FID jet and collector

6890a 6890 plus