Affordable Access

Publisher Website

Fe+chemical ionization of peptides

Authors
Journal
Journal of the American Society for Mass Spectrometry
1044-0305
Publisher
Springer-Verlag
Publication Date
Volume
4
Issue
2
Identifiers
DOI: 10.1016/1044-0305(93)85065-6
Disciplines
  • Chemistry

Abstract

Abstract Laser-desorbed peptide neutral molecules were allowed to react with Fe + in a Fourier transform mass spectrometer, using the technique of laser desorption/chemical ionization. The Fe + ions are formed by laser ablation of a steel target, as well as by dissociative charge-exchange ionization of ferrocene with Ne +. Prior to reaction with laser-desorbed peptide molecules, Fe + ions undergo 20–100 thermalizing collisions with xenon to reduce the population of excited-state metal ion species. The Fe + ions that have not experienced thermalizing collisions undergo charge exchange with peptide molecules. Iron ions that undergo thermalizing collisions before they are allowed to react with peptides are found to undergo charge exchange and to form adduct species [M + Fe +] and fragment ions that result from the loss of small, stable molecules, such as H 2O, CO, and CO 2, from the metal ion-peptide complex.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Chemical ionization of neutral peptides produced b...

on Chemical Physics Letters Jan 01, 1998

Ammonia chemical ionization of some free amino aci...

on International Journal of Mass... Jan 01, 1977

Femtosecond laser-induced ionization/dissociation...

on Journal of the American Chemic... Jan 28, 2009
More articles like this..