%0 Journal Article
%T Relationship between fluorescence characteristics and molecular weight distribution of natural dissolved organic matter in Lake Hongfeng and Lake Baihua, China
%A YUE Lanxiu
%A <br>YUE Lanxiu
%A WU Fengchang
%A LIU Congqiang
%A LI Wen
%A FU Pingqing
%A BAI Yingchen
%A WANG Liying
%A YIN Zuoying & Lü Zhicheng . State Key Laboratory of Environmental Geochemistry
%A Institute of Geochemistry
%A Chinese Academy of Sciences
%A Guiyang
%A China
%A . Shougang Institute of Technology
%A Beijing
%A China
%J 科学通报(英文版)
%D 2006
%I 
%X Dissolved organic matter (DOM) is one of the most interesting and difficult problems in recent years due to its important functions in the ecological and environmental system and the complexity of its chemical composition and structure. It is well ac- cepted that fluorescence characteristics and mo- lecular weight distribution are two important pa- rameters in the DOM characterization. However, the relationship between them is still unknown. In this study, fluorescence and molecular weight distribution of DOM in Lake Hongfeng, Lake Baihua and their rivers, and their relationship were investigated using the combination of fluorescence spectroscopy and high-performance size exclusion chromatography (HPSEC) with on-line UV absorbance and fluores- cence detectors. The results show that there were two obvious humic-like fluorescence peaks (Peaks A and B) in DOM from lake water. But there was an- other obvious protein-like fluorescence peak (Peak C) in DOM from river water. The humic-like fluorescence material consisted of DOM fraction with smaller mo- lecular weight, ranging from 1.0 to 3.0 kDa, while the protein-like fluorescence material mainly consisted of DOM fraction with MW larger than 2.0 kDa. The cal- culation of MW using HPSEC was related to the UV absorbance wavelength chosen.
%K high-performance size-exclusion chromatography
%K dis- solved organic matter
%K molecular weight
%K UV absorbance
%K fluores- cence spectra<br>荧光性能
%K 分子量
%K 色谱分析
%K 溶解有机物
%K 湖泊
%K 吸光度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=8C297563BFE4B1A226B96DAA38B89A6A&yid=37904DC365DD7266&vid=987EDA49D8A7A635&iid=CA4FD0336C81A37A&sid=CFAC5CB624A41AFD&eid=6700D0D256586E73&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=1&reference_num=28