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
id2794, QDA