Ion Mobility Measurements in Organic Phases
Final rept. 16 Aug 2002-15 Feb 2003
WASHINGTON STATE UNIV PULLMAN DEPT OF CHEMISTRY
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Liquid phase ion mobility spectrometry LPIMS is a novel analytical technique where ions are separated by electric field in a liquid medium. The electric field is established via a series of electrodes spaced evenly through the ion drift tube, similar to the drift tube design used in gas-phase IMS. Because no electrolyte is used in LPIMS, the method is a low current i.e. low noise method in which the current is carried by the ions produced in the ionization source. This report documented the first LPIMS spectra of aqueous samples drifting through an organic liquid phase. LPIMS spectra of aqueous ammonium nitrate and aqueous sodium chloride solutions were obtained using two different LPIMS designs. A single peak was observed for sodium ion with a reduced mobility Ko, of 5.3 x lO-4 V-1 s-1, which is similar to the expected value of 5.7 x 10-4 cm2 V-1 s-1.
- Atomic and Molecular Physics and Spectroscopy