This paper presents a developed dielectric-barrier-discharge–based “sniffer” that offers unique characteristics not available from other techniques. It is a portable, highly specific, and sensitive detector that operates at atmospheric pressure. It provides both molecular and elemental information on organic and inorganic gases and particulate aerosols. Measurements were made to electrically characterize the plasma and calculate the energy coupled into the plasma. We created a signature database for diverse chemicals based on the atomic and diatomic emission spectrum that serves to classify the compound and ideally recognize it by composition with the optical emission intensity corresponding to concentration. For some operational regimes and species, emission from OH (A2Σ+–X2Π), CH (A2Δ–X2Π), and often C2 (d3Πg–a3Πu; Swan band system) diatomic radicals is produced. Limits of detection extend to parts per billion (ppb) levels for some species such as decane, 2-decanol, and nitrobenzene. Results are presented for differentiation of classes of organic compounds such as alkanes, aromatics, oxygenates, chlorinated, and nitrogen-containing organic compounds.
Randall Vander L. Wal, Jane H. Fujiyama-Novak, Chethan Kumar Gaddam, Debanjan Das, Aditya Hariharan, and Benjamin Ward, "Atmospheric Microplasma Jet: Spectroscopic Database Development and Analytical Results," Appl. Spectrosc. 65, 1073-1082 (2011)
References are not available for this paper.
OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.