Abstract：The fluorescent components and their distribution and variation of dissolved organic matter (DOM) were examined using excitation emission matrix fluorescence spectroscopy-parallel factor analysis technique (EEMs-PARAFAC) for samples collected during June, 2008 from Minjiang River, a typical subtropical reservoir-type river ecosystem. Three separate fluorescent components were identified by PARAFAC, including two dominant humic-like components (C1: <250, 325/424 nm; C2: 270, 395/482 nm) and one protein-like component (C3: <250, 280/358 nm), of which humic-like components were dominant. Fluorescence analysis provided a ‘fingerprint’ technique to trace the mixing of DOM between three tributaries in the upstream of Minjiang River. The nearly constant concentration and composition in the main stream of Minjiang River reflected the effect of dam construction. Correlation and principal component analysis (PCA) revealed that humic-like components were principally derived from flushing of watershed soils, while protein-like component was formed from in-situ production which could be used as a proxy of the concentration of total dissolved nitrogen (TDN). Multi-linear regression of fluorescent components C2 and C3 can be used to trace the variation of dissolved organic carbon (DOC) concentration. This study demonstrates that Minjiang is a typical subtropical reservoir-type river which still keeps relatively ‘unpolluted’ aquatic environment.
Key words：Dissolved organic matter;Excitation-emission-matrix spectroscopy;Parallel factor analysis (PARAFAC);Reservoir;Minjiang river
郭卫东，杨丽阳，王福利，陈文昭，王新红，洪华生. 水库型河流溶解有机物三维荧光光谱的平行因子分析[J]. 光谱学与光谱分析, 2011, 31(02): 427-430.
GUO Wei-dong, YANG Li-yang, WANG Fu-li, CHEN Wen-zhao, WANG Xin-hong, HONG Hua-sheng. Parallel Factor Analysis for Excitation Emission Matrix Fluorescence Spectroscopy of Dissolved Organic Matter from a Reservoir-Type River. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(02): 427-430.
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