Device for Measuring the Acidity of Airborne Contaminants

Technology #12685

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Myoseon Jang
Managed By
Lenny Terry
Assistant Director 352-392-8929
Patent Protection
US Patent 8,557,184

Reduces Cost and Resources Necessary for Measuring Acidity

This technique for measuring the acidity of airborne materials is faster and more cost-efficient. This technology uses a distinct technique of colorimetry to respond to the change in acidity of filter samples. Unlike existing products, there is no need for the traditional processing steps to attain the measurements with the pH method or ion chromatography technique. According to The World Health Organization, 4.6 million people die each year from causes directly attributable to air pollution; with 1.5 million of these deaths attributable to indoor air pollution. University of Florida researchers have developed this device providing a cutting-edge solution to monitoring airborne contamination.


Device for measuring the acidity of airborne contaminants


  • Requires no solvent processing, reducing cost and resources necessary for measuring acidity compared to the traditional pH method or ion chromatography method
  • Sampling time is greatly reduced, providing more rapid results expediting public awareness of environmental conditions
  • Provides a technique that requires no chemical processing of material, rendering an environmentally safe product that can be placed in various locations
  • Device has portable capabilities, increasing profit potential by allowing application in various fields and locations that may require monitoring of air quality


This new method and instrument are used to measure particle acidity. The airborne matter is collected on the filter impregnated with color indicators. The technique uses colorimetry to respond to the change in acidity of filter samples. The resulting color change is monitored with reflectance UV-Visible spectrometry. This technique eliminates the water extraction process, which are often used in conventional pH measurement method. Due to no workup process, this technique allows one to measure aerosol acidity in situ and on-line. The sampling time is enormously shorter than conventional pH method or ion chromatography method.

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