A tandem quadrupole ion-storage trap, time-of-flight instrument using matrix-assisted laser desorptionl ionization has been constructed. Desorbed ions are lint trapped in an RF' field and collisionally relaxed prior to time-of-!light mass analysis. So far masses up to 90 kDa, a resolution of up to 7
A Practical Ion Trap Mass Spectrometer for the Analysis of Peptides by Matrix-Assisted Laser Desorption/Ionization
β Scribed by Qin, Jun; Steenvoorden, Ruud J. J. M.; Chait, Brian T.
- Book ID
- 126453138
- Publisher
- American Chemical Society
- Year
- 1996
- Tongue
- English
- Weight
- 248 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0003-2700
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The stored waveform inverse Fourier transform (SWIFT) technique is used for broadband excitation of ions in an ion-trap mass spectrometer to perform mass-selective accumulation, isolation, and fragmentation of peptide ions formed by matrix-assisted laser desorptionlionization. Unit mass resolution i
An ion trap has been modified for the analysis of high mass ions generated by matrix-assisted laser desorption/ionization. Samples are deposited on a probe tip and introduced directly onto the hyperbolically shaped surface of one endcap. All three electrodes - both the endcaps and the ring electrode