%0 Journal Article
%T SPECTROSCOPIC CHARACTERISTICS OF AQUATIC HUMIC SUBSTANCES IN THE UV AND VISIBLE REGION<br>水生腐殖酸的可见—紫外光谱特征
%A Tao Shu Cui Jun Zhang Chaosheng
%A <br>陶澍
%A 崔军
%A 张朝生
%J 地理学报
%D 1990
%I 
%X Spectroscopic examination of humic substances from river, lake and sea water as well as from river and lake sediments in the UV-VIS region indicated that the E240/E420) ratios of water humic substances differ significantly from those of sediment humic substances. A cluster analysis based on the absorption spectra of the humic substances revealed a similar fact. Considering the humic substances from fresh water and sea water respectively, linear relationship between the optical density and the total organic carbon content of the samples implied that a spectrophotometric method (e.g. at 220 nm) for determination of humic substances concentration is possible.
%K humic substances
%K UV-VIS absorption spectra
%K cluster analysis<br>腐殖质
%K VIS-UV吸收光谱
%K 聚类分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=E106A1791E6B63EB&yid=8D39DA2CB9F38FD0&iid=E158A972A605785F&journal_id=0375-5444&journal_name=地理学报&referenced_num=2&reference_num=0