Four-step DOAS calibration method of SO_2 in flue gas

作     者：周涛 刘斌 孙长库 

作者机构：State Key Laboratory of Precision Measurement Technology and InstrumentsTianjin University 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2009年第7卷第6期

页      面：539-541页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the Program for New Century Excellent Talents in University 

主　　题：Beverages Calibration Flue gases 

摘      要：SO2 monitoring in the flue gas of a coal burning boiler is important for environmental protection. The non- linearity of practical condition causes deviation from theoretical law. On the basis of the Lambert-Beer Law, a new four-step calibrntion method is introduced. This method includes cross section interpola- tion, 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%.