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Waters

No 169 peak on QDa - WKB2794

Article number: 2794

SYMPTOMS

  • Very weak 169 peak on Pos Internal Calibration
  • Intense peak at 159
  • 479, 761, and 1159 Da peaks are passing

ENVIRONMENT

  • QDa

CAUSE

A low cone voltage setting causes poor ionization of the 169 Da peak.

FIX or WORKAROUND

Optimize cone voltage (approximately 40 V).

ADDITIONAL INFORMATION

 

QDA

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