Gallien S, Duriez E, Peterman S, Demeure K, Domon B.
ASMS 2012 Poster
• The novel hybrid quadrupole‐orbitrap mass spectrometer offers unique
capabilities for high resolution /accurate mass measurements, while enabling
isolation of low abundance components by setting a narrow m/z selection
• The MS/MS capabilities of this instrument provide an additional stage of
selectivity by performing quantification on fragment ions.
• To scale up the number of peptides targeted in one single LC‐MS/MS analysis,
acquisition parameters need to be adapted to maintain acceptable cycle times.
It includes the relaxation of orbitrap resolving power, and the simultaneous measurement of several peptide fragmentation spectra, which implies the
selection of wider precursor m/z ranges or several precursor m/z ranges
• The performance of the Parallel Reaction Monitoring (PRM) method was
explored by a systematic evaluation of the pertinent instrumental parameters
to estimate (e.g. quadrupole isolation window, orbitrap resolution) their impact
on selectivity, sensitivity, and the number of peptides targeted in one LC‐MS
Luxembourg Clinical Proteomics Center