Hardware manual

4-62 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Cleaning the Torch
To clean the torch, complete the following steps:
1 Soak the torch overnight in 5% nitric acid.
When soaking the torch in nitric acid, gently rock the torch from side to side
to remove air bubbles trapped inside. Wear gloves when handling nitric
acid.
2 Rinse the torch with pure water.
Rinse the torch at least 3 times with pure water. Place on a clean surface to
dry.
3 Dry the torch.
Before installing the torch, blow it dry with clean argon or nitrogen to
remove any remaining water.
CAUTION
Do not apply chemicals such as HF to the glass.
Do not use an ultrasonic bath.
CAUTION
The torch may crack or the plasma may not ignite properly if the torch is re-installed
while wet.