TY - JOUR
T1 - Atmospheric microplasma jet
T2 - Spectroscopic database development and analytical results
AU - Vanderwal, Randall L.
AU - Fujiyama-Novak, Jane H.
AU - Gaddam, Chethan Kumar
AU - Das, Debanjan
AU - Hariharan, Aditya
AU - Ward, Benjamin
PY - 2011/9
Y1 - 2011/9
N2 - 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 (A2-X2Π), CH (A 2-X2Π), and often C2 (d3Π g-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.
AB - 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 (A2-X2Π), CH (A 2-X2Π), and often C2 (d3Π g-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.
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U2 - 10.1366/10-06219
DO - 10.1366/10-06219
M3 - Article
C2 - 21929864
AN - SCOPUS:80052954710
SN - 0003-7028
VL - 65
SP - 1073
EP - 1082
JO - Applied Spectroscopy
JF - Applied Spectroscopy
IS - 9
ER -