Maintaining An Ecd Detector; Ecd Bakeout - Agilent Technologies 6890 Series Service Manual

Gas chromatograph

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Maintaining an ECD detector

If your ECD baseline is noisy or the display frequency is too high (i.e., ≥100),

you should perform a thermal cleaning (also called a "bakeout") of the

detector. Before performing a bakeout, verify that the carrier supply gas and

flow system are leak- and contaminant-free.

Detector disassembly and/or cleaning procedures other than thermal should

be performed only by personnel trained and licensed appropriately to handle

radioactive materials. Trace amounts of radioactive

during these other procedures, causing possible hazardous exposure to β- and

x-radiation (bremsstrahlung).

To prevent possible hazardous contamination of the area with radioactive

material, the detector exhaust vent must always be connected to a fume hood,

or otherwise vented in compliance with the latest revision of Title 10, CFR,

Part 20, or with state regulations with which the Nuclear Regulatory

Commission has entered into an agreement (USA only). For other countries,

consult with the appropriate agency for equivalent requirements.

Record the ECD "Output" value from the GC display. If the number is

equal to or greater than 100, continue with this procedure.

Turn off the anode purge and makeup gas flows.

Remove the column from the detector.

Cap the bottom of the makeup gas adapter with a blank column ferrule

and column nut.

Set the makeup gas flow rate between 50 and 60 mL/min. Set the detector

temperature between 350 and 375°C.

Agilent 6890 Gas Chromatograph Service Manual

Electron Capture Detector (ECD)

Maintaining an ECD detector

Ni may be removed

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