Liquid phase ion mobility spectrometry
| Autor: | Maggie Tam, Herbert H. Hill |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Spectrometry
Mass Electrospray Ionization Analytical chemistry Thermal ionization Bradykinin Biochemistry Analytical Chemistry Atmospheric-pressure laser ionization Ionization Physics::Atomic and Molecular Clusters Electrochemistry Environmental Chemistry Hexanes Physics::Chemical Physics Direct electron ionization liquid chromatography–mass spectrometry interface Spectroscopy Electron ionization Ambient ionization Ions Chemical ionization Chemistry Water Benzene Equipment Design Ion source Condensed Matter::Soft Condensed Matter Quaternary Ammonium Compounds |
| Zdroj: | The Analyst. 136(15) |
| ISSN: | 1364-5528 |
| Popis: | A novel analytical method, called Liquid Phase Ion Mobility Spectrometry (LiPIMS) was demonstrated, where aqueous phase analytes were ionized and introduced into non-aqueous liquids, transported by an external electric field from the point of generation to a collection electrode. Ions were produced from a unique liquid phase ionization process, called Electrodispersion Ionization. Spectra of analyte ions illustrated the potential of LiPIMS as a new separation technique. Experimental data showed that electrodispersion ionization was effective in generating nanoampere level of ion current in hexane and benzene from aqueous samples. By controlling the ionization voltage in relation to the sample flow rate, it was possible to operate the electrodispersion ionization source in both continuous and pulsed ionization modes. Unique LiPIMS spectra of aqueous samples of tetramethylammonium bromide, tetrabutylammonium bromide and bradykinin were presented and their respected liquid phase ion mobility values were determined. |
| Databáze: | OpenAIRE |
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