5 Maintenance
Cleaning the spray chamber - weekly
Agilent Triple Quadrupole LC/MS System User Guide 94
7 Dampen a clean lint-free cloth with a mixture of LC/MS-grade isopropanol and
LC/MS-grade water. For Multimode, be careful not to touch the thermocouple
probe.
8 Wipe the interior of the spray chamber with a clean lint-free cloth.
9 Make sure you wear clean gloves. Use a tech wipe to hold the parts as you
remove them. They will be warm.
10 Clean the spray shield, capillary cap, end plates, and contact ring under fume
hood. Carefully remove the canted coil spring from the capillary cap before
cleaning.
11 Use 4000 grit abrasive paper to clean contaminants from the parts.
12 Put the spray shield, capillary cap, end plates, and contact ring in the beaker.
13 Add a 50:50 mix of LC/MS-grade isopropanol and LC/MS-grade water in a
beaker.
14 Put the beaker in sonication for 5 minutes.
15 Drain the solvent and remove the parts from the beaker.
16 Dry the parts by using nitrogen gas.
17 Carefully insert the canted coil back into the capillary cap.
18 Reinstall the contact ring, end plate, capillary cap, and spray shield.
19 Reinstall the spray chamber on the instrument.
20 Close the spray chamber.
21 Close the latch of spray chamber.
22 Connect all cables and tubings to the instrument.
Do not bend or blunt the tip of the needle, as it will decrease system
performance. Sharpening the needle is not needed.
23 Pull and twist the 4000 grit abrasive paper along the needle and off the tip of
the needle.
Do not hit the tip of the corona needle. The tip can bend, which can decrease
system performance.
24 Starting at the base of the needle, wipe the needle with a clean lint-free cloth.
The cloth can be dry or dampened with LC/MS-grade isopropanol.
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