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Compact Plasma Ionization for Ion Mobility Spectrometry Using a 4.3 MHz Miniature Tesla Coil.

Simon Höving1, Hao Song1, Luisa Speicher1

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A new low-cost plasma ionization source using a miniaturized Tesla coil offers a stable and effective method for ion mobility spectrometry (IMS). This 3D-printed device provides comparable performance to traditional sources, making IMS more accessible.

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Area of Science:

  • Analytical Chemistry
  • Instrumentation Science

Background:

  • Ion mobility spectrometry (IMS) is a powerful analytical technique for separating and identifying ions.
  • Traditional ionization sources for IMS, such as Nickel-63 (Ni63) beta emitters, can be expensive and have regulatory limitations.
  • There is a need for low-cost, accessible, and reliable ionization sources for IMS.

Purpose of the Study:

  • To develop and evaluate a low-cost, compact plasma ionization source for IMS applications.
  • To investigate the use of a miniaturized Tesla coil and 3D printed housing for plasma generation.
  • To assess the performance of the developed source for ionizing various analytes.

Main Methods:

  • A miniaturized 4.3 MHz Tesla coil was integrated into a 3D printed cyclic olefin copolymer (COC) housing.
  • The plasma source was connected to stainless steel screw electrodes for analyte ionization.
  • Measurements were performed in both positive and negative ion modes for analytes including limonene, MTBE, nicotine, 2-octanone, and propofol.

Main Results:

  • A stable and directed plasma was successfully generated using the Tesla coil and 3D printed housing.
  • The plasma source effectively ionized a range of analytes in both positive and negative ion modes.
  • Performance was comparable to traditional Ni63 beta emitters, demonstrating its viability as an alternative.

Conclusions:

  • The developed 4.3 MHz plasma ionization source is a low-cost, effective, and reliable alternative for IMS.
  • The integration of 3D printing allows for customized and accessible analytical instrumentation.
  • This technology has the potential to broaden the application and availability of IMS systems.