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Automatic function switching and its usefulness in peptide and protein analysis using direct infusion microspray quadrupole time‐of‐flight mass spectrometry
Author(s) -
Hoyes Emmy,
Gaskell Simon J.
Publication year - 2001
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.430
Subject(s) - chemistry , quadrupole time of flight , mass spectrometry , tandem mass spectrometry , quadrupole , function (biology) , analytical chemistry (journal) , ion , chromatography , mode (computer interface) , time of flight , biological system , computer science , atomic physics , physics , organic chemistry , evolutionary biology , biology , operating system
Automatic function switching has been investigated for high‐throughput protein identification and sequencing of peptides using direct infusion of tryptic digests on a quadrupole time‐of‐flight instrument. The increase in speed and the high quality of data make it a favourable technique for tandem mass spectrometry when compared to manual selection of each precursor ion; these advantages are not restricted to combined LC/MS/MS analyses for which the automatic function‐switching mode was originally developed. This mode was compared to analyses performed using a slow scan of the quadrupole analyzer with repeated recording of product ion spectra. For the specific purpose of generating product ion data for sequence determination (as opposed to surveying all precursors of a selected product ion), the automatic function‐switching mode was, as expected, markedly superior with respect to speed of analysis and quality of data. Furthermore, the automatic function‐switching mode provides greater versatility with respect to selection of optimal collision energies. Copyright © 2001 John Wiley & Sons, Ltd.