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Novel Procedure for Molecular Weight Averages Measurement of Polydisperse Polymers Directly from Matrix-assisted Laser Desorption/Ionization Time-of-flight Mass Spectra

1996; Wiley; Volume: 10; Issue: 12 Linguagem: Inglês

10.1002/(sici)1097-0231(199609)10

1097-0231

Giorgio Montaudo, Emilio Scamporrino, Daniele Vitalini, Placido Mineo,

Advanced Chemical Sensor Technologies

Rapid Communications in Mass SpectrometryVolume 10, Issue 12 p. 1551-1559 Research Article Novel Procedure for Molecular Weight Averages Measurement of Polydisperse Polymers Directly from Matrix-assisted Laser Desorption/Ionization Time-of-flight Mass Spectra Giorgio Montaudo, Giorgio Montaudo Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorEmilio Scamporrino, Corresponding Author Emilio Scamporrino Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalyDipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorDaniele Vitalini, Daniele Vitalini Istituto per la Chimica e la Tecnologia dei Materiali Polimerici, CNR-Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorPlacido Mineo, Placido Mineo Istituto per la Chimica e la Tecnologia dei Materiali Polimerici, CNR-Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this author Giorgio Montaudo, Giorgio Montaudo Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorEmilio Scamporrino, Corresponding Author Emilio Scamporrino Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalyDipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorDaniele Vitalini, Daniele Vitalini Istituto per la Chimica e la Tecnologia dei Materiali Polimerici, CNR-Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this authorPlacido Mineo, Placido Mineo Istituto per la Chimica e la Tecnologia dei Materiali Polimerici, CNR-Catania, Viale A. Doria, I-95125 Catania, ItalySearch for more papers by this author First published: 1996 https://doi.org/10.1002/(SICI)1097-0231(199609)10:12 3.0.CO;2-7Citations: 63AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract A new method for the determination of reliable molecular weight averages (MW) and polydispersity index (MWD) values for polydisperse polymers, directly analyzing their matrix-assisted laser/desorption ionization time-of-flight (MALDI-TOF) mass spectra, is reported. Our success is due to the concerted effect of an off-line procedure of MALDI-TOF spectrum processing that includes: (i) signal smoothing to improve the recorded traces of the spectra up to high m/z values; (ii) a subtraction of the misleading contribution to the signals introduced by the offset used in spectrum recording; (iii) examination of the spectra up to the highest possible m/z value for a better accuracy in estimating the MW values. To illustrate this method, three polymers with a wide polydispersity index, a polydimethylsiloxane, a polymethylmethacrylate, and a bisphenol-A copolyether, have been analyzed. Contrary to the general opinion that MW values can be measured directly by MALDI-TOF only for polymers with a very narrow mass distribution, the data reported here show that our off-line procedure is also able to measure reliable MW values for polydisperse materials. Citing Literature Volume10, Issue121996Pages 1551-1559 RelatedInformation