Rapid Elemental Analysis of Aerosols Using Atmospheric Glow Discharge Optical Emission Spectroscopy

Analytical Chemistry
Lina Zheng, Pramod Kulkarni

Abstract

A new, low-cost approach based on the application of atmospheric radio frequency glow discharge (rf-GD) optical emission spectroscopy (OES) has been developed for near real-time measurement of multielemental concentration in airborne particulate phase. This method involves deposition of aerosol particles on the tip of a cathode in a coaxial microelectrode system, followed by ablation, atomization, and excitation of the particulate matter using the rf-GD. The resulting atomic emissions are recorded using a spectrometer for elemental identification and quantification. The glow discharge plasma in our system was characterized by measuring spatially resolved gas temperatures (378-1438 K) and electron densities (2-5 × 1014 cm-3). Spatial analysis of the spectral features showed that the excitation of the analyte occurred in the region near the collection electrode. The temporal analysis of spectral features in the rf-GD showed that the collected particles were continuously ablated; the time for complete ablation of 193 ng of sucrose particles was found to be approximately 2 s. The system was calibrated using 100 nm particles containing C, Cd, Mn, and Na, respectively. The method provides limits of detection in the range of 0.055-1.0...Continue Reading

References

Feb 19, 2000·Journal of the Air & Waste Management Association·A J HunterM E Fraser
Feb 16, 2006·Analytical and Bioanalytical Chemistry·E Vors, L Salmon
Jul 18, 2009·Analytical and Bioanalytical Chemistry·Scott Weagant, Vassili Karanassios
Jan 1, 2012·Journal of Analytical Atomic Spectrometry·Prasoon K Diwakar, Pramod Kulkarni
Jan 1, 2012·Aerosol Science and Technology : the Journal of the American Association for Aerosol Research·Prasoon DiwakarM Eileen Birch
Jun 20, 2017·Journal of Aerosol Science·Lina ZhengDionysios D Dionysiou
Jun 24, 2017·Aerosol Science and Technology : the Journal of the American Association for Aerosol Research·Lina ZhengDionysios D Dionysiou

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Citations

Nov 25, 2020·Analytical Methods : Advancing Methods and Applications·Mengting JinDezheng Yang
Sep 11, 2019·Analytical Chemistry·Lina Zheng, Pramod Kulkarni

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