Carbon Nanotube Electron Ionization Source for Portable Mass Spectrometry
| Autor: | Luann Becker, Andrew H. Monica, Christina Hammock, Charles B. Parker, Robert J. Cotter, Jeffrey T. Glass, Theresa Evans-Nguyen, Elena Adams |
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| Rok vydání: | 2011 |
| Předmět: |
Static secondary-ion mass spectrometry
Nanotubes Carbon Physics::Instrumentation and Detectors Chemistry Analytical chemistry Thermal ionization Electrons Carbon Dioxide Mass spectrometry Mass Spectrometry Ion source Analytical Chemistry Condensed Matter::Materials Science Physics::Accelerator Physics Physics::Atomic Physics Quadrupole ion trap Direct electron ionization liquid chromatography–mass spectrometry interface Nuclear Experiment Electrodes Electron ionization Ambient ionization |
| Zdroj: | Analytical Chemistry. 83:6527-6531 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | Cold cathode carbon nanotubes (CNTs) are used in a low-voltage quadrupole ion trap mass spectrometer and shown to be a viable low-power alternative to filament sources for portable mass spectrometry instrumentation. No heating is necessary, and the power consumption depends only on the switching characteristics of the electronics. The CNT electron sources are mounted directly in the ring electrode, and their performance is compared directly with a filament source also mounted in the ring electron. Up to a 5 × 10(-4) Torr CO(2) environment, reflecting conditions expected during operation in a Mars atmosphere, the CNT emitters may provide up to 1 μA of current over more than 200 h. |
| Databáze: | OpenAIRE |
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