Chromatogram dips in sync with the LockSpray channel selection on Xevo QTof style source. - WKB11231

SYMPTOMS

• Every time the baffle turns to select the LockSpray channel, there is a dip or spike in the sample chromatogram.

ENVIRONMENT

• Xevo LockSpray style source on QTofs
• Xevo QTof
• Xevo G2 QTof
• Xevo G2-S QTof
• Xevo G2-XS QTof
• Synapt G2
• Synapt G2-S
• Synapt G2-Si
• Vion

CAUSE

Dirty baffle.

FIX or WORKAROUND

1. Remove the baffle (see article Baffle stuck in the wrong position on Xevo style source for instructions on how to remove the baffle).

2. Clean the baffle. It can be cleaned the same way a cone is cleaned (see How to clean the cone on a Waters Mass Spectrometer.)
3. Put the baffle back in place. 

ADDITIONAL INFORMATION