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Eur. J. Mass Spectrom. 9, 61 - 70 (2003)
DOI: 10.1255/ejms.510

Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry of dextran and dextrin derivatives

Sajid Bashir, Peter Critchley*and Peter J. Derrick
Institute for Mass Spectrometry and Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
Paul J. Gates and James Staunton
Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK

ABSTRACT:
Application of matrix-assisted laser desorption/ionization (MALDI) to the analysis of dextran and dextrin derivatives, specifically glucose saccharides, by time-of-flight (TOF) mass spectrometry has been reported. MALDI-TOF analysis was carried out on alpha-, beta- and gamma-cyclodextrin, two O-methylated-beta-cyclodextrins of differing degrees of substitution (DS) and dextrans (a linear glucose saccharide), as pure and doped solutions and as mixtures of two or more of these. Doping was carried out with trace amounts of inorganic salts. The purpose of the analysis of the cyclodextrins was to determine whether they would form inclusion complexes with the various cations added, or whether less specific cation addition/exchange was occurring either prior to desorption or in the gas phase

Keywords: MALDI, alkali metal ion complexes, cyclodextrins, methylated cyclodextrins, dextran

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