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Related Experiment Videos

Solid phase micro-extraction in a miniature ion trap mass spectrometer.

Leah S Riter1, Eduardo C Meurer, Ismael Cotte-Rodriguez

  • 1Chemistry Department, Purdue University, West Lafayette, IN 47907, USA.

The Analyst
|October 8, 2003
PubMed
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Fiber introduction mass spectrometry (FIMS) offers a rapid, sensitive method for analyzing volatile organic compounds (VOCs) in air and water. This fieldable approach uses a miniature mass spectrometer for effective in situ detection.

Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Spectrometry

Background:

  • Solid-phase microextraction (SPME) and membrane introduction mass spectrometry (MIMS) are established techniques.
  • Direct sample introduction into mass spectrometers can improve analysis speed and sensitivity.
  • Portable analytical instruments are crucial for field applications.

Purpose of the Study:

  • To develop and evaluate a Fiber Introduction Mass Spectrometry (FIMS) system.
  • To assess the performance of FIMS for analyzing volatile organic compounds (VOCs).
  • To demonstrate the fieldable application of FIMS for in situ analysis.

Main Methods:

  • Utilized a miniature mass spectrometer with a custom inlet system for direct SPME needle introduction.

Related Experiment Videos

  • Employed a poly(dimethylsiloxane) (PDMS) coated fiber for analyte extraction.
  • Implemented thermal desorption and electron ionization within a cylindrical ion trap (CIT).

    • Main Results:

    • Achieved limits of detection in the low parts per billion (ppb) range for VOCs in air and aqueous headspace.
    • Demonstrated rapid signal response times (0.1-1 s rise, 1.2-6 s fall) with heated desorption.
    • Successfully quantified toluene in BTX mixtures and gasoline samples.

    Conclusions:

    • FIMS is a robust, simple, rapid, and sensitive method for in situ VOC analysis.
    • The system is fieldable, accurate, and reproducible, suitable for various matrices.
    • This technique offers an effective approach for portable, on-site environmental monitoring.