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Normal-inverse bimodule operation Hadamard transform ion mobility spectrometry.

Yan Hong1, Chaoqun Huang2, Sheng Liu3

  • 1Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, China; School of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan, Anhui, China.

Analytica Chimica Acta
|June 17, 2018
PubMed
Summary

A new normal-inverse bimodule operation Hadamard transform - ion mobility spectrometry (NIBOHT-IMS) technique suppresses spurious peaks and enhances signal-to-noise ratio (SNR) in ion mobility spectrometry. This method improves detection for both large and small ion signals.

Keywords:
Hadamard transformIon mobility spectrometrySignal-to-noise ratioSpurious peaks

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Area of Science:

  • Analytical Chemistry
  • Spectrometry

Background:

  • Hadamard transform ion mobility spectrometry (HT-IMS) can suffer from spurious peaks.
  • Improving signal-to-noise ratio (SNR) is crucial for accurate ion detection.

Purpose of the Study:

  • To develop a novel technique for suppressing spurious peaks and enhancing SNR in HT-IMS.
  • To evaluate the effectiveness of the new technique for real sample detection.

Main Methods:

  • Developed a normal-inverse bimodule operation Hadamard transform - ion mobility spectrometry (NIBOHT-IMS) technique.
  • Utilized normal and inverse pseudo-random binary sequences (PRBS) to control the ion gate.
  • Obtained normal and inverse HT-IMS spectra and calculated the NIBOHT-IMS spectrum by subtraction.

Main Results:

  • The NIBOHT-IMS technique significantly suppressed or eliminated spurious peaks.
  • Enhanced SNR was observed for reactant ions.
  • Demonstrated effective spurious peak elimination and SNR improvement for both large and small ion signals using CHCl3 and CH2Br2.

Conclusions:

  • The NIBOHT-IMS technique is effective in improving spectral quality for ion mobility spectrometry.
  • This method offers enhanced detection capabilities for various ion signal sizes.