5 Maintenance
Replacing the corona needle
Agilent Triple Quadrupole LC/MS System User Guide 124
Replacing the corona needle
Schedule
Perform this procedure when symptoms indicate poor corona needle
performance and cleaning the needle does not restore performance.
Equipment List
• Clean, powder-free nitrile gloves
• Corona needle
Steps
1 Before beginning any steps in this maintenance procedure, put on clean,
powder-free nitrile gloves.
2 Pull the corona needle assembly out of the spray chamber.
3 Remove the needle collar from the corona needle shaft.
4 Remove the old corona needle from the collar.
5 Install a new corona needle, with its integral ferrule, in the collar.
6 Turn the collar onto the needle holder and tighten it by hand.
Do not hit tip of the corona needle. The tip can bend, which can decrease
system
7 Reinstall the corona needle assembly in the spray chamber.
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