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A new ozone denuder for aerosol sampling based on an ionic liquid coating.
Alexandre Albinet1, Nicolas Papaiconomou, Julien Estager
1Laboratoire Chimie Moléculaire Environnement (LCME-Polytech'Savoie), Université de Savoie, Campus de Savoie Technolac, 73376 Le Bourget du Lac, France. alexandre.albinet@gmail.com
Analytical and Bioanalytical Chemistry
|November 11, 2009
Summary
A novel ionic liquid coating effectively removes ozone during particulate matter sampling. This new ozone denuder coating demonstrates high particle transmission and stability in diverse atmospheric conditions.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
- Materials Science
Background:
- Ozone can interfere with particulate matter sampling, leading to measurement artifacts.
- Conventional denuder coatings may have limitations in stability and efficiency.
- Ionic liquids offer tunable properties for potential applications in air quality monitoring.
Purpose of the Study:
- To synthesize and evaluate a novel ionic liquid as a coating for ozone denuder devices.
- To assess the performance of the ionic liquid-coated denuder in terms of particle transmission and ozone removal efficiency.
- To investigate the durability of the ionic liquid coating under various atmospheric conditions.
Main Methods:
- Synthesis of 1-octyl-3,5-dimethylpyridinium iodide ([O35LUT][I]) ionic liquid.
- Coating application onto a denuder for a high-volume aerosol sampler (30 m3 h-1).
- Testing particle transmission (10–2,500 nm) and ozone removal (120 ppbv) over 120 hours.
Main Results:
- Over 99% particle transmission was achieved for particles in the 10–2,500 nm range.
- The ionic liquid coating effectively removed over 97% of ozone for approximately 120 hours.
- The denuder performed well under both dry and damp outdoor atmospheric conditions.
Conclusions:
- Iodide-based ionic liquids are a promising alternative to conventional denuder coatings for ozone removal.
- This technology can reduce sampling artifacts in particulate matter analysis.
- Potential applications include specialized aerosol sampling and broader environmental monitoring.
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