protonated molecule

(redirected from protonated molecular ion)

protonated molecule

In mass spectrometry, an ion formed by adding a proton to a neutral molecule, which is designated as M H.
References in periodicals archive ?
To ensure that matrix effects were not obscuring peaks, we verified that the protonated molecular ion of the 5 internal standards, which spanned the retention time of interest, were present at the expected retention time.
The most feasible structures of product ions for the MS/MS spectrum of the protonated molecular ion, m/z 154, of D are depicted in Fig.
The collision-induced dissociation (CID) spectrum of m/z 130, which corresponds to the protonated molecular ion of the racemic PA mixture, is shown in Fig.
5 min gave a protonated molecular ion at m/z 148, which corresponded to glutamic acid and cochromatographed with pure L-glutamic acid.
Loss of the n-butyl moieties from the protonated molecular ion of MMA (m/z 231) yielded the fragment at m/z 119, which was not detected in the product ion scan of 20 [micro]mol/L succinic acid but became apparent at higher concentrations.
By performing MS/MS in the ion trap, we can first isolate the benzoylecgonine protonated molecular ion (290 m/z) and then perform CID in the trap, with the knowledge that any resulting product ions originated from the 290 m/z ion.
LC effluents can be introduced into mass spectrometers using ESI, which typically produces protonated molecular ions.
To generate fragment ions of the molecular ion through collision-induced dissociation, 2 analytical runs (7 and 3 alternating scan events) were carried out at m/z 272, 494, 367, 324, 491, 446, and 450, which correspond to the protonated molecular ions [[M+H].