𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Enhanced Cationization of Polymers Using Delayed Ion Extraction with Matrix-assisted Laser Desorption/Ionization

✍ Scribed by Ian A. Mowat; Robert J. Donovan; Robert R. J. Maier

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
292 KB
Volume
11
Category
Article
ISSN
0951-4198

No coin nor oath required. For personal study only.

✦ Synopsis

Cation attachment during matrix-assisted laser desorption/ionization (MALDI) of various synthetic polymers was investigated. The ions were created in a field-free source and extracted by a pulsed electric field applied at a known and variable time delay after the laser pulse. This is shown to increase the magnitude of the cationized polymer signal obtained, and also allows higher laser intensities to be used to induce fragmentation in the polymer. Additional structural information is thus provided about the monomers and end groups that is not available from measurements solely of the mass distribution of the intact cationized polymer. Delayed extraction can also provide important information about the timescale of the cation attachment processes occurring during MALDI.

πŸ“œ SIMILAR VOLUMES

A Quantitative Analysis of Serum Sulfati
A Quantitative Analysis of Serum Sulfatide by Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry with Delayed Ion Extraction
✍ Eiko Sugiyama; Atsushi Hara; Kei-ichi Uemura πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 89 KB

## Matrix-assisted laser desorption ionization time-offlight mass spectrometry with delayed ion extraction (DE MALDI-TOF MS ) was applied for the first time for the quantitation of sulfatide content in serum at the picomole level. The total lipids extracted by n-hexane: isopropanol (3:2, v/v) from

Matrix-assisted Laser Desorption/Ionizat
Matrix-assisted Laser Desorption/Ionization of Synthetic Polymers with Azo Compound Matrices
✍ H. M. Donny Liu; Urs P. Schlunegger πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 591 KB

## Sample preparation All polymer samples were from commercial sources and used without further purification. PEG-2OOO dimethyl ether, PEG-4000, PEG-6000, PEG-10 OOO and PEG-35 OOO were purchased from Fluka (Buchs, Switzerland). The Polystyrene (PS) standards PS12500, PS/3700, PS/12500, PS35 OOO a

Time-delayed extraction matrix-assisted
Time-delayed extraction matrix-assisted laser desorption/ionization time-of-flight mass spectrometry of polyacrylnitrile and other synthetic polymers with the matrixΒ­4-hydroxybenzylidene malononitrile
✍ Katharina Linnemayr; Philipp Vana; GΓΌnter Allmaier πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 200 KB πŸ‘ 2 views

Matrix selection and sample preparation technique, namely finding a suitable matrix-analyte combination, has been one of the most important concerns in applying positive and negative ion matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to synthetic polymers. Most matrices used i

Delayed extraction experiments using a r
Delayed extraction experiments using a repulsing potential before ion extraction: evidence of non-covalent clusters as ion precursor in UV matrix-assisted laser desorption/ionization. Part IIβ€”Dynamic effects with Ξ±-cyano-4-hydroxycinnamic acid matrix
✍ I. Fournier; A. Brunot; J. C. Tabet; G. Bolbach πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 371 KB

## Abstract Delayed extraction experiments were undertaken to gain a better insight into the dynamic effects involved in the ion formation in UV matrix‐assisted laser desorption/ionization. Part I1 was devoted to a 2,5‐dihydroxybenzoic (2,5‐DHB) matrix. The results clearly demonstrated the existenc