Research on concentration retrieval of the SO2/Hg0 gas mixture

摘要

The paper researches on the concentration retrieval of the SO2/Hg0 gas mixture based on a continuum source, first using the DOAS (Differential Optical Absorption Spectroscopy) retrieves the concentration of SO2 in the total absorbance, and then removes it and retrieves the concentration of Hg0 using the way of concentration relationship curve. The result show that for the mixed gas, the retrieval error of SO2 are less than 5%, however, the error of Hg0 are more than 20%, and the less of the concentration, the greater of the error. So, the conclusion is that, when Hg0 in such a low concentration condition, the existence of SO2 will cause great interference, so must improve the algorithm to promote the retrieval precision.