Mr. Hongmei Wang Profile

Hongmei Wang

at Hefei Institutes of Physical Science

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Proceedings Article | 12 May 2005 Paper

Detection of sulfur dioxide by metastable N2 (A3 Sigma u+) energy transfer

H. Wang, X. Tang, J. Li, H. Han, S. Zhou, Y. Chu, W. Zhang

Proceedings Volume 5832, (2005) https://doi.org/10.1117/12.619855

KEYWORDS: Molecules, Energy transfer, Emission spectroscopy, Sulfur, Capillaries, Nitrogen, Chemical species, Metals, Molecular energy transfer, Magnesium

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Metastable transfer emission spectronmetry (MTES) has been shown to be an extremely sensitive method for the determination of trace metals. In this work it was shown that MTES can also be used as a sensitive method for the determination of SO₂ EDF and capillary sampling system were employed to determine the detection limit of the flowing afterglow system on the SO2 detection. The characteristic emission lines of SO₂ (^~a³B₁ → ^~X¹A₁) are used to detect the concentration of SO₂ and also can be used to identify SO₂ from other S-containing molecules such as CS₂. In addition S0₂ in a flowing tube has been detected down to 45μg m^-3 by means of metastable N₂ (A³Σ_U⁺) energy transfer emission spectroscopy. The linear measurement range is from 0.045 to 0.8 mg m^-3. The capability of metastable transfer emission spectroscopy in the quantitative determination of S0₂ has been evaluated. And the lowest detection limit of S0₂ in the dilution gas N₂ has been confirmed to be about 10 times as much as that in the air because of the great consumption of N₂ (A³Σ_u⁺) by 0₂.

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