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Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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OpenDMS: An Open-Source Approach to Differential Mobility Spectrometry.

Dylan T Koch1,2, Yevgeniy Belous3,2, Bradley S Chew3,2

  • 1Department of Electrical and Computer Engineering, University of California Davis, One Shields Avenue, Davis, California 95616, United States.

Analytical Chemistry
|June 19, 2025
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Summary

We developed OpenDMS, an affordable, open-source differential mobility spectrometry system. This customizable platform enhances accessibility to advanced chemical analysis for broader scientific innovation.

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Area of Science:

  • Analytical Chemistry
  • Spectrometry

Background:

  • Differential mobility spectrometry (DMS) offers high sensitivity and rapid analysis for various scientific fields.
  • Commercial DMS systems are often expensive, proprietary, and lack flexibility, limiting widespread adoption.

Purpose of the Study:

  • Introduce OpenDMS, an open-source, accessible, customizable, and cost-effective differential mobility spectrometry system.
  • To foster innovation and collaboration by providing an open platform for DMS technology.

Main Methods:

  • Constructed OpenDMS using readily available components.
  • Developed fully documented designs and open-source software for data processing and visualization.
  • Demonstrated system performance using dispersion plots and sensitivity analyses.

Main Results:

  • Achieved a theoretical limit of detection of 38 ppt and a resolving power of 1.57 for an ethylbenzene monomer.
  • Showcased system versatility with interchangeable plasma and UV ionization sources.
  • Confirmed compatibility with doping, demonstrated by acetone shifting the DMMP monomer peak.

Conclusions:

  • OpenDMS provides a cost-effective and flexible alternative to commercial DMS systems.
  • The open-source nature of OpenDMS is expected to accelerate advancements in proteomics, metabolomics, and environmental monitoring.
  • This platform encourages wider access and innovation in gas-phase chemical analysis.