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Related Experiment Videos

Sub-miniature ExB sector-field mass spectrometer.

J A Diaz1, C F Giese, W R Gentry

  • 1Universidad de Costa Rica, San Jose. jdiaz@micit.go.cr

Journal of the American Society for Mass Spectrometry
|June 13, 2001
PubMed
Summary

Researchers developed a novel miniature mass spectrometer using advanced fabrication techniques. This compact, low-cost instrument offers performance comparable to commercial analyzers, enabling portable analytical applications.

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Area of Science:

  • Analytical Chemistry
  • Instrument Development
  • Sensor Technology

Background:

  • Traditional mass spectrometers are often large, expensive, and power-intensive.
  • There is a need for portable, cost-effective analytical instruments for various applications.

Purpose of the Study:

  • To design and fabricate a novel sub-miniature, double-focusing sector-field mass spectrometer.
  • To achieve high performance in a compact and low-power device.
  • To enable portable and low-cost analytical instrumentation.

Main Methods:

  • Fabrication using conventional machining and thin-film patterning.
  • Design based on a 90-degree cylindrical crossed electric and magnetic sector-field analyzer.
  • Performance optimization using finite element analysis and computer modeling.

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Main Results:

  • Achieved a resolving power of 10^6 (FWHM).
  • Demonstrated a detection limit near 10 parts per million and a dynamic range of 5 orders of magnitude.
  • Mass range up to 10^3 Da with a compact size (3.5x6x7.5 cm), low weight (0.8 kg), and low power consumption (2.5 W).

Conclusions:

  • The miniature mass spectrometer exhibits performance comparable to commercial residual gas analyzers.
  • The instrument's small size, low cost, and high performance make it suitable for portable analytical applications.
  • This development opens possibilities for widespread use in field analysis and resource-limited settings.