Article (Scientific journals)
Optimization of Matrix Conditions for the Control of MALDI In-Source Decay of Permethylated Glycans.
Smargiasso, Nicolas; De Pauw, Edwin
2010In Analytical Chemistry, sous presee
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Keywords :
Mass Spectrometry; Glycans; MALDI-ISD; MALDI IMAGING
Abstract :
[en] Due to its fastness and its easiness to use, MALDI-MS is currently an analytical tool widely used in glycomic applications. However, the MALDI ionization process could result in the so-called "in-source decay", or ISD, of analytes, leading to complex spectra. On the other hand, ISD opens the possibility to perform pseudo-MS(3) experiments. This phenomenon must therefore be controlled in order to be used on demand as a supplementary tool for the analysis of permethylated glycans by MALDI mass spectrometry. For this purpose, several matrices were tested and MALDI imaging was used to determine optimal conditions promoting or, inversely, avoiding ISD of permethylated glycans. 2,5-DHB was shown to be a versatile matrix allowing one to induce or prevent ISD according to the location of laser shots. Inversely, it was shown that 9-aminoacridine forms homogeneous spots and avoids completely ISD. This matrix would therefore be suitable for automatic analysis.
Research Center/Unit :
Giga-Systems Biology and Chemical Biology - ULiège
CART - Centre Interfacultaire d'Analyse des Résidus en Traces - ULiège
Disciplines :
Chemistry
Biochemistry, biophysics & molecular biology
Author, co-author :
Smargiasso, Nicolas ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
Optimization of Matrix Conditions for the Control of MALDI In-Source Decay of Permethylated Glycans.
Publication date :
2010
Journal title :
Analytical Chemistry
ISSN :
0003-2700
eISSN :
1520-6882
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
sous presee
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
GLYCO (FEDER)
Funders :
FEDER - Fonds Européen de Développement Régional
F.R.S.-FNRS - Fonds de la Recherche Scientifique
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