The purpose of this study was to design a quadrupole secondary ion mass spectrometer for simultaneous detection of both positive and negative ions of different mass. An original setup based on a quadrupole electrostatic deflector configuration that allows energy and spatial separation of all types o
Instrumentation and Methodology for Simultaneous Excitation/Detection of Ions in an FTICR Mass Spectrometer
β Scribed by Schmidt, Eric G.; Fiorentino, Michael A.; Arkin, C Richard; Laude, D. A.
- Book ID
- 126413929
- Publisher
- American Chemical Society
- Year
- 2000
- Tongue
- English
- Weight
- 110 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0003-2700
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π SIMILAR VOLUMES
Modulated resonant excitation leading to collisionally induced dissociation (CID) of isolated molecular ions of di-ortho-, mono-ortho-and non-ortho-substituted tetrachlorobiphenyl (PCB) compounds was accomplished in a quadrupole ion trap. While the ion trap was irradiated with a supplementary a.c. s
Time-sharing of electrodes between excitation and detection for Fourier transform (lT) study of the coherent cyclotron motion of ions is discussed, together with the choice of a suitable commutation device. A practical implementation is described, and the application to an open-end, flat, ion cyclot
While positive and negative ions are created simultaneously in a quadrupole ion trap during electron ionization, there is a marked preponderance of the former species. With prolonged ionization and a relatively high concentration of substrate molecules, positive ion species of low mass/charge ratio