Overtone mobility spectrometry: part 1. Experimental observations.

ABSTRACT: A new method that allows a linear drift tube to be operated as a continuous ion mobility filter is described. Unlike conventional ion mobility instruments that use an electrostatic gate to introduce a packet of ions into a drift region, the present approach uses multiple segmented drift regions with modulated drift fields to produce conditions that allow only ions with appropriate mobilities to pass through the instrument. In this way, the instrument acts as a mobility filter for continuous ion sources. By changing the frequency of the applied drift fields it is possible to tune this instrument to transmit ions having different mobilities. A scan over a wide range of drift field frequencies for a single ion species shows a peak corresponding to the expected resonance time of the ions in on

SUBMITTER: Kurulugama RT 

PROVIDER: S-EPMC2709233 | biostudies-literature | 2009 May

REPOSITORIES: biostudies-literature