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Updated: Mar 26, 2026
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Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments
Published on: January 20, 2022
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A compact high resolution electrospray ionization ion mobility spectrometer
T Reinecke1, A T Kirk1, A Ahrens1
1Leibniz Universität Hannover, Institute of Electrical Engineering and Measurement Technology, Appelstr. 9A, 30167 Hannover, Germany.
Talanta
|February 4, 2016
Summary
We enhanced an ion mobility spectrometer with an electrospray ionization source, maintaining high resolution (R=100). This setup allows independent temperature control for solvent evaporation, crucial for analyzing various analytes.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
Background:
- Electrospray ionization (ESI) is a key technique for liquid analysis, producing ions via charged droplet evaporation.
- High resolution ion mobility spectrometry (IMS) offers powerful separation capabilities.
- Previous IMS setups utilized tritium sources for ionization.
Purpose of the Study:
- To integrate an electrospray ionization source into a high-resolution ion mobility spectrometer.
- To characterize the performance of the modified IMS system, particularly its resolving power and temperature control capabilities.
- To investigate the influence of temperature and solvent composition on ion formation and mobility.
Main Methods:
- Coupling an electrospray ionization source to a 75 mm drift tube ion mobility spectrometer.
- Replacing the tritium ionization source with an electrospray needle, variable-length desolvation region, and a three-grid ion shutter.
- Performing parametric studies on temperature effects in the desolvation region (up to 100 °C) with varying water/methanol solvent ratios.
- Operating the system in negative ion mode and analyzing bentazon spectra.
Main Results:
- The modified IMS system with ESI source achieved a resolving power of R=100, comparable to the previous tritium source configuration.
- Independent heating of the desolvation region allows drift region temperature to remain at room temperature.
- Parametric studies revealed the influence of temperature and solvent composition on solvent evaporation and ion mobility for different analytes.
- Negative ion mode spectra of bentazon were successfully obtained with various solvents.
Conclusions:
- The integration of an electrospray ionization source into a high-resolution ion mobility spectrometer is successful, maintaining analytical performance.
- The system's independent temperature control offers flexibility in optimizing desolvation and analyzing thermally sensitive compounds.
- This enhanced IMS setup provides a versatile platform for characterizing analytes in solution using electrospray ionization.
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