[1] [1] Platt U. Differential Optical Absorption Spectroscopy(DOAS). Air Monitoring by Spectroscopic Techniques[M]. New York: John Wiley,1994.

[2] [2] Platt U. Modern methods of the measurement of atmospheric trace gases(invited lecture)[J]. Phys.Chem. Chem. Phys., 1999, 1: 5409-5415.

[3] [3] Lee J S, Kim Y J, Kuk B, et al. Simultaneous measurements of atmospheric pollutants and visibility with a long-path DOAS system in urban areas[J]. Environmental Monitoring and Assessment, 2005, 104: 281-293.

[4] [4] Mellqvist J, Rosen A. DOAS for flue gas monitoring-Ⅰ Temperature effects in the UV visible absorption spectra of NO, NO2, SO2 and NH3[J]. J. Quant. Spectrosc. Radiat. Transfer., 1996,56(2): 187-208.

[5] [5] Mellqvist J, Rosen A. DOAS for flue gas monitoring-Ⅱ Deviations from the Beer-Lambert law for the UV/visible absorption spectra of NO,NO2, SO2 and NH3[J]. J. Quant. Spectrosc. Radiat. Transfer., 1996, 56(2): 209-224.

[6] [6] Mellqvist J, Axelsson H, Rosen A. DOAS for fluegas monitoring-Ⅲ In-situ monitoring of sulfur dioxide, nitrogen monoxide and ammonia[J].J. Quant. Spectrosc. Radiat. Transfer., 1996,56(2): 225-240.

[7] [7] Edmonds M, Herd R A, Galle B, et al. Automated, high time-resolution measurements of SO2 flux at Soufriere Hills Volcano, Montserrat[J].Bull. Volcanol., 2003, 65(8): 578-586.

[8] [8] Zhou Bin, Liu Wenqing, Qi Feng, et al. Study of concentration retrieving method in differential optical absorption spectroscopy for measuring air pollutants[J]. Acta Physica Sinica, 2001, 50(9):1818-1823(in Chinese).