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《Chinese Optics Letters》 2009年06期
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Four-step DOAS calibration method of SO_2 in flue gas

周涛  刘斌  孙长库  
【摘要】:SO2 monitoring in the flue gas of a coal burning boiler is important for environmental protection.The nonlinearity of practical condition causes deviation from theoretical law.On the basis of the Lambert-Beer Law,a new four-step calibration method is introduced.This method includes cross section interpolation,weighting spectral region combination,acquiring the spectrum with new calibration devices,and least-square fitting.Compared with conventional methods,this new method is low cost,convenient,and accurate.In the proof test,SO2 samples with different concentrations are measured.The average errors are less than 1.5%,while the maximum deviation is less than 4.5%.
【作者单位】State
【基金】:supported by the Program for New Century Excellent Talents in University
【分类号】:X701.3

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