Agilent 7820 GC Service
77
This procedure summarizes the general steps
for cleaning the parts. You need to follow the
standard safety practices of your laboratory
for handling chemicals. For example, wear the
appropriate safety eye glasses, lab coat, and
gloves.
Scratches on the NPD jet affect its performance.
If you choose to clean the jet, be sure not to
scratch or bend the jet.
It is often more convenient to replace dirty jets with new ones
than to clean them, especially jets that have been badly
contaminated.
1 Gather the following:
 Small ultrasonic cleaning bath
 Aqueous detergent
 GC-grade methanol in a Teflon wash bottle. Wash bottles
made of other materials usually contain plasticizer
contaminates.
 Dry, filtered, compressed air or nitrogen
 Clean cloth
If you are cleaning the jet, run the cleaning wire through the tip of
the jet. Run it back and forth a few times until it moves smoothly.
Be careful not to scratch the jet.
Place the parts in your glassware, cover them with the aqueous
detergent, and place them in the ultrasonic bath for 1 to 5
minutes.
Remove the parts from the bath and push the wire brush through
the collector.
Rinse the parts in tap water or distilled water.
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