利用特征光谱荧光标记与高斯拟合分析水体中有机物的特性  

Analysis of the Characters of Organic Matter in Water Using Spectral Fluorescence Signature and Fitting Gaussian

作　　者：赵南京[1] 刘文清[1] 崔志成[1] 张玉均[1] 刘建国[1] 李宏斌[1] 杨立书[1] 

机构地区：[1]中国科学院环境光学与技术重点实验室

出　　处：《光谱学与光谱分析》2006年第5期922-924,共3页Spectroscopy and Spectral Analysis

基　　金：中国科学院知识创新工程方向性项目(KGCX2-SW-111)资助

摘　　要：讨论了一种自然水体中有机物的快速分析方法,以激光诱导荧光(LIF)方法测量了水体的总荧光光谱(TLS);利用特征光谱荧光标记(SFS)技术对水体中溶解有机物(DOM)及叶绿素a(Chl a)的荧光光谱进行了正确的指认和提取。以最小二乘法-Gaussian拟合对水体的TLS进行了拟合,可有效地分离出拉曼散射及荧光光谱,拟合的相关系数优于0·9964。结果表明,通过在TLS中利用SFS技术正确的指认特定污染物,并以Gaussian拟合进行有效地提取,可以进行水体污染物的快速、实时和在线监测。A sort of analytical method of fast diagnosis of organic matter in water is discussed. The total luminescence spectra （TLS） of water samples in combination with laser induced fluorescence （LIF） measurements using 532 nm wavelength excitation source were measured in the laboratory. The spectra of dissolved organic matter （DOM） and chlorophyll a （Chl a） were pointed out and obtained with spectral fluorescence signature （SFS） technique The spectrum of water Raman scattering and fluorescence of DOM and Chl a were separated from TLS with fiting Gaussian of the least squares method, and a high correlation coefficient excelling 0. 964 was obtained. The results indicated the possibilities of water quality monitoring in real time and on line based upon SFS technique and fitting Gaussian of the least squares method.

关 键 词：激光诱导荧光(LIF) 特征光谱荧光标记(SFS) 最小二乘法-Gaussian拟合 溶解有机物(DOM) 叶绿素a(Chl a) 

分 类 号：X832[环境科学与工程—环境工程] O433.5[机械工程—光学工程]