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An open source isolated data acquisition with trigger pulse generation for ion mobility spectrometry.

Tim Kobelt1, Martin Lippmann1, Alexander Nitschke1

  • 1Leibniz University Hannover, Institute of Electrical Engineering and Measurement Technology, Department of Sensors and Measurement Technology, Appelstr. 9A, 30167 Hannover, Germany.

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Summary

We developed open-source data acquisition hardware for advanced ion mobility spectrometers (IMS) and other instruments. This hardware synchronizes measurements and offers flexible, parallel digitalization for complex analytical applications.

Keywords:
Data acquisitionIon mobility spectrometryOptical isolationPulse generation

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Area of Science:

  • Analytical Chemistry
  • Instrumentation
  • Open Source Hardware

Background:

  • Ion mobility spectrometers (IMS) are vital for trace gas detection and analytical applications like medicine and food quality.
  • Coupling IMS with other equipment necessitates synchronized electronics.
  • Instrumental complexity in IMS is increasing.

Purpose of the Study:

  • To present an open-source data acquisition hardware solution.
  • To meet the needs of advanced IMS and other analytical instruments.
  • To enable synchronized operation and flexible data acquisition.

Main Methods:

  • Developed open-source data acquisition hardware.
  • Integrated trigger pulse generation for synchronization.
  • Incorporated dual, isolated 16-bit analog-to-digital converters (ADCs) with 250 kS/s sampling rate.
  • Implemented a galvanically isolated trigger input.

Main Results:

  • The hardware provides trigger pulses for synchronized operation of IMS ion gates and external devices.
  • Parallel digitalization is achieved using two isolated ADCs at up to 250 kS/s.
  • Galvanic isolation ensures synchronized starts, crucial for coupling with instruments like gas chromatographs.
  • Isolated ADCs offer flexibility in defining ground potential for instrument setups.

Conclusions:

  • The presented open-source hardware effectively addresses synchronization and data acquisition challenges in advanced IMS.
  • It offers a flexible and robust solution applicable to various analytical instrumentation setups.
  • This development facilitates more complex and synchronized analytical workflows.