Direct chemical analysis of solids by laser ablation in an ion storage time-of-flight mass spectrometer.
Anal Chem
; 76(5): 1249-56, 2004 Mar 01.
Article
en En
| MEDLINE
| ID: mdl-14987078
ABSTRACT
A laser ablation/ionization mass spectrometer system is described for the direct analysis of solids, particles, and fibers. The system uses a quadrupole ion trap operated in an ion storage mode, coupled with a reflectron time-of-flight mass spectrometer). The sample is inserted radially into the ring electrode, and an imaging system allows direct viewing and selected analysis of the sample. Measurements identified trace contaminants of Ag, Sn, and Sb in a Pb target with single laser shot experiments. Resolution (m/Delta m) of 1500 and detection limits of approximately 10 pg have been achieved with a single laser pulse. The system configuration and related operating principles for accurately measuring low concentrations of isotopes are described.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Anal Chem
Año:
2004
Tipo del documento:
Article
País de afiliación:
Estados Unidos