Journal
JOURNAL OF MASS SPECTROMETRY
Volume 47, Issue 8, Pages 1023-1033Publisher
WILEY
DOI: 10.1002/jms.3057
Keywords
mass spectrometry; desorption electrospray ionization; orbitrap; matrix-assisted laser desorption-ionization; gel permeation chromatography; polymer; copolymer
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Desorption ElectroSpray Ionization (DESI) - Orbitrap Mass Spectrometry (MS) was evaluated as a new tool for the characterization of various industrial synthetic polymers (poly(ethylene glycol), poly(propylene glycol), poly(methylmethacrylate), poly(dimethylsiloxane)) and copolymers, with masses ranging from 500 g.mol-1 up to more than 20?000 g.mol-1. Satisfying results in terms of signal stability and sensitivity were obtained from hydrophobic surfaces (HTC Prosolia) with a mixture water/methanol (10/90) as spray solvent in the presence of sodium salt. Taking into account the formation of multiplied charged species by DESI-MS, a strategy based on the use of a deconvolution software followed by the automatic assignment of the ions was described allowing the rapid determination of Mn, Mw and PDI values. DESI-Orbitrap MS results were compared to those obtained from matrix-assisted laser desorption/ionization- time-of-flight MS and gel permeation chromatography. An application of DESI-Orbitrap MS for the detection and identification of polymers directly from cosmetics was described. Copyright (c) 2012 John Wiley & Sons, Ltd.
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