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Waters

Unable to calibrate in negative ion mode on Xevo G2-XS when there is a good beam in the tune page or manual tune - WKB61788

Article number: 61788

SYMPTOMS

  • no beam in negative ion when the calibration is running, but the ions are there in the tune page or manual tune

ENVIRONMENT

  • MassLynx
  • UNIFI
  • Xevo G2-XS
  • sodium formate calibration

CAUSE

Large contaminant ion (1e7) at 126 Da on which the system is setting the attenuation parameters

FIX or WORKAROUND

Calibrate from 150 Da and up rather than 120 and up

ADDITIONAL INFORMATION

 

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