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

H. M. Wang; X. S. Tang; J. Q. Li; H. Y. Han; S. K. Zhou; Y. N. Chu; W. J. Zhang

doi:10.1117/12.619855

12 May 2005 Detection of sulfur dioxide by metastable N₂ (A³ Sigma _u⁺) energy transfer

H. M. Wang, X. S. Tang, J. Q. Li, H. Y. Han, S. K. Zhou, Y. N. Chu, W. J. Zhang

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619855
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

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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H. M. Wang, X. S. Tang, J. Q. Li, H. Y. Han, S. K. Zhou, Y. N. Chu, and W. J. Zhang "Detection of sulfur dioxide by metastable N₂ (A³ Sigma _u⁺) energy transfer", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619855

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