Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Laser desorption ionization and MALDI time-of-flight mass spectrometry forlow molecular mass polyethylene analysis
Autore:
Chen, R; Yalcin, T; Wallace, WE; Guttman, CM; Li, L;
Indirizzi:
Univ Alberta, Dept Chem, Edmonton, AB T6G 2G2, Canada Univ Alberta Edmonton AB Canada T6G 2G2 hem, Edmonton, AB T6G 2G2, Canada NIST, Div Polymers, Gaithersburg, MD 20899 USA NIST Gaithersburg MD USA 20899 , Div Polymers, Gaithersburg, MD 20899 USA Univ Alberta, Dept Chem, Edmonton, AB, Canada Univ Alberta Edmonton AB Canada Alberta, Dept Chem, Edmonton, AB, Canada
Titolo Testata:
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
fascicolo: 11, volume: 12, anno: 2001,
pagine: 1186 - 1192
SICI:
1044-0305(200111)12:11<1186:LDIAMT>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIELD DESORPTION; SYNTHETIC-POLYMERS; IDENTIFICATION; ADDITIVES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Li, L Univ Alberta, Dept Chem, W3-39 Chem Bldg, Edmonton, AB T6G 2G2, Canada Univ Alberta W3-39 Chem Bldg Edmonton AB Canada T6G 2G2 2G2, Canada
Citazione:
R. Chen et al., "Laser desorption ionization and MALDI time-of-flight mass spectrometry forlow molecular mass polyethylene analysis", J AM SOC M, 12(11), 2001, pp. 1186-1192

Abstract

Polyethylene's inert nature and difficulty to dissolve in conventional solvents at room temperature present special problems for sample preparation and ionization in mass spectrometric analysis. We present a study of ionization behavior of several polyethylene samples with molecular masses up to 4000 Da in laser desorption ionization (LDI) time-of-flight mass spectrometers equipped with a 337 nm laser beam. We demonstrate unequivocally that silver or copper ion attachment to saturated polyethylene can occur in the gas phase during the UV LDI process. In LDI spectra of polyethylene with molecular masses above similar to 1000 Da, low mass ions corresponding to metal-alkene structures are observed in addition to the principal distribution. Byinterrogating a well-characterized polyethylene sample and a long chain alkane, C94H190, these low mass ions are determined to be the fragmentation products of the intact metal-polyethylene adduct ions. It is further illustrated that fragmentation can be reduced by adding matrix molecules to the sample preparation. (C) 2001 American Society for Mass Spectrometry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 20:03:17