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Fan-based device for integrated air sampling and microextraction.

Francisco A Casado-Carmona1, Guillermo Lasarte-Aragonés1, Abuzar Kabir2

  • 1Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071, Córdoba, Spain.

Talanta
|May 3, 2021
PubMed
Summary

A novel, portable air sampler utilizes a computer fan for air pumping and sorptive phase support. This device enhances measurement precision with an integrated internal standard, offering versatile VOC analysis.

Keywords:
Air samplerBiogenic volatile organic compoundsFabric phasesIn-site extractionPortable deviceSemi-volatile organic compoundsVolatile organic compounds

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Materials Science

Background:

  • Accurate air quality monitoring is crucial for environmental and occupational health.
  • Existing air sampling devices can be bulky, energy-intensive, and lack portability.
  • There is a need for cost-effective, portable, and versatile air sampling solutions.

Purpose of the Study:

  • To present and evaluate a new, compact air sampler built around a conventional computer fan.
  • To demonstrate the sampler's capability for analyzing volatile and semi-volatile organic compounds.
  • To highlight the device's portability and low energy consumption.

Main Methods:

  • A computer fan was modified to act as both an air pump and a support for sol-gel Carbowax 20M coated fabric sorptive phases.
  • An integrated internal standard system was developed to improve measurement precision.
  • Analyte extraction and analysis were performed using headspace vials and gas chromatography-mass spectrometry (GC-MS).

Main Results:

  • The sampler was successfully characterized for extracting volatile organic compounds (VOCs) like chloroform, benzaldehyde, toluene, and cyclohexane.
  • The device demonstrated versatility by identifying semi-volatile compounds in a laboratory residue storage room (toluene, xylene).
  • Biogenic volatile compounds (terpenes) were successfully identified in natural samples (pine needles, orange peel).

Conclusions:

  • The developed computer fan-based air sampler is a portable, low-energy, and cost-effective solution for air quality monitoring.
  • The integrated internal standard enhances measurement precision, making it suitable for quantitative analysis.
  • The sampler's versatility allows for the detection of a wide range of compounds, from VOCs to biogenic volatiles.