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Related Experiment Videos

A tandem ion trap/ion mobility spectrometer

Creaser1, Benyezzar, Griffiths

  • 1Department of Chemistry and Physics, Nottingham Trent University, UK.

Analytical Chemistry
|July 25, 2000
PubMed
Summary

A new quadrupole ion trap/ion mobility spectrometer (QIT/IMS) enables structural analysis using ion mobility. This instrument provides detailed insights into the gas-phase structures of ions and noncovalent complexes.

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A further comment

Anaesthesia·2000

Area of Science:

  • Analytical Chemistry
  • Physical Chemistry
  • Spectroscopy

Background:

  • Structural analysis of ions in the gas phase is crucial for understanding chemical interactions.
  • Existing techniques may have limitations in ion manipulation and separation.
  • Ion mobility spectrometry offers a method to probe ion structures based on their size and shape.

Purpose of the Study:

  • To construct and characterize a novel tandem quadrupole ion trap/ion mobility spectrometer (QIT/IMS).
  • To evaluate the instrument's capability for structural and conformational studies of various ions.
  • To demonstrate the application of QIT/IMS for analyzing noncovalent complexes.

Main Methods:

  • Construction of a hybrid QIT/IMS instrument combining ion trap mass spectrometry and ion mobility drift cell.
  • Operation of the ion trap for ion accumulation, manipulation, mass selection, and ion generation.
  • Gas-phase electrophoretic separation of mass-selected ions in a helium buffer gas within the drift cell.
  • Detection of ions using an in-line electron multiplier and data processing with a multichannel scaler.

Main Results:

  • The QIT/IMS instrument was successfully constructed and demonstrated.
  • Preliminary data show effective ion accumulation, mass selection, and mobility separation.
  • The system was applied to study the structures of aromatic ions and protonated amine/crown ether noncovalent complexes.

Conclusions:

  • The developed QIT/IMS is a powerful tool for gas-phase ion structural analysis.
  • The hybrid instrument integrates the strengths of ion trap mass spectrometry and ion mobility spectrometry.
  • This approach facilitates detailed structural and conformational investigations of molecular ions and complexes.

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