Determination of C1-C4 alkanes by ion mobility spectrometry
| Autor: | Roger F. Wernlund, Daniel R. Kojiro, Norishige Takeuchi, Robert M. Stimac, Donald E. Humphry, Martin J. Cohen |
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| Rok vydání: | 1991 |
| Předmět: |
Extraterrestrial Environment
Ion-mobility spectrometry United States National Aeronautics and Space Administration Analytical chemistry chemistry.chemical_element Propyne Mass spectrometry Helium Chemistry Techniques Analytical Analytical Chemistry Ion chemistry.chemical_compound Ionization Alkanes Exobiology Physics::Atomic and Molecular Clusters Physics::Atomic Physics Physics::Chemical Physics Alkane chemistry.chemical_classification Chromatography Spectrum Analysis Space Flight Carbon Hydrocarbons United States chemistry Isobutane Solar System |
| Zdroj: | Analytical chemistry. 63 |
| ISSN: | 0003-2700 |
| Popis: | Results are presented from a comparison between two ion-mobility-spectrometer (IMS) methods of sample ionisation: a conventional IMS with very dry helium and an IMS using metastable helium ionization. As one of the tests, a mixture of several hydrocarbons expected to be the components of Titan's atmosphere (made of ethane, ethylene, acetylene, propane, n-butane, isobutane, and propyne in concentrations from 20 to 200 ppm) was analyzed by both methods. Results from the dry-He IMS showed that the dry-helium approach was more adequate for the analysis of these gases than the metastable-helium IMS approach. In the metastable-He approach, in which several versions of He ionization reaction were tested, the spectra produced were not as clear as the conventional IMS spectra, due to the fact that the strong electric field introduced in the reaction region to generate metastable helium affected the gating, resolution, and collection of the ions. |
| Databáze: | OpenAIRE |
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