东海海水中荧光溶解有机物质的三维荧光光谱特征  

Fluorescence Characterization of Dissolved Organic Matter in East China Sea

作　　者：王江涛[1] 关哈斯高娃[1] 赵卫红[2] 王修林[1] 

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]中国科学院海洋研究所海洋生态与环境科学重点实验室,山东青岛266071

出　　处：《光谱学与光谱分析》2009年第5期1345-1348,共4页Spectroscopy and Spectral Analysis

基　　金：科技部国际科技合作重点项目(2004DFA03600);国家“973”计划项目(2001CB409703)资助

摘　　要：2005年3～4月在东海采集了海水样品,利用三维荧光光谱(EEMs)技术测定了水体中溶解有机物质的荧光性质,通过荧光光谱图中荧光峰的位置、数量、强度的变化及荧光峰之间的相关性,初步判断了荧光物质的种类、分布和来源。东海水体中检测到七种荧光峰,分别为高、低激发波长类色氨酸和类酪氨酸荧光峰、紫外腐殖质荧光峰、可见腐殖质荧光峰和海洋腐殖质荧光峰,其中荧光峰B,S和A出现在整个调查海区中;荧光峰T和D出现在调查海域的北部;类腐殖质荧光峰M和C只出现在部分站位的水样中。荧光物质在研究海域表层的主要来源为长江输入,在中层,荧光物质是长江输入和浮游植物共同作用的结果。不同荧光峰强度之间具有较好的正相关性,表明调查海域水体中的类蛋白荧光物质和类腐殖质荧光物质有着相同的来源或在结构上具有某种联系。Sea water samples were collected in the East China Sea in March and April, 2005, and three-dimensional fluorescence of dissolved organic matter was measured by fluorescence excitation-emission matrix spectroscopy. The position, number and intensity of fluorescence peak in the spectra and the relations of the peaks were analyzed to determine the type, distribution and origin of the fluorescence dissolved organic matter. Seven types of fluorescence peaks were detected from the samples. There are protein-like fluorescence peaks B with Exmax/Emmax =275/300 um, D with Exmax/Emmax=225/295-305 um, T with Exmax/Emmax =280/345 nm, and S with Exmax/Emmax= 225-240/320-350 um, two humic-like peaks A with Exmax/Emmax = 250-255/410-455 nm and C 335-345/410-440 nm, and marine humie peak M with Exmax/Emmax =305 mn/400-420 nm. Peaks B, S and A appeared in all surveyed area. Peaks T and D appeared in the north of the surveyed area. Peaks M and C only appeared in a few stations. In the surface layer, the source of the fluorescence dissolved organic matter might be the fresh water outflow of the Yangtze River, while the fluorescence dissolved organic matter in the middle layer had double sources from the Yangtze River and the phytoplankton. The good correlationships of different fluorescence peaks showed the same source or some relationship between the protein-like and the humic-like fluorescence dissolved organic matter.

关 键 词：三维荧光光谱(EEMs) 东海 荧光 溶解有机物质 

分 类 号：O657.3[理学—分析化学]