巴塔哥尼亚（阿根延）海洋与河水中腐植酸组成比较

比较了Enga西。海湾海水（大西洋）和丘布特河水（阿根廷的巴塔哥尼亚）中腐殖质的结构。这些腐殖质被分离、纯化后，通过元素分析法，核磁共振法（C13和1H谱），红外光谱法，紫外吸收法和荧光法等对其结构特性进行了分析鉴定，并以氮含量、氧含量、H／C比、C／N比、红外波段中氮和羧基官能团含量、核磁共振吸收谱线中官能团的斜率系...

Comparison of Marine and River Water Humic Substances in Patagonian

Structural aspects of humic substances in marine waters of Engano Bay （Atlantic Ocean） and water from the Chubut River （Patagonia, Argentina） were compared. The humic substances were isolated, purified, and analyzed us-ing a multiple-method approach for structural characterization elemental analysis, nuclear magnetic resonance （13C and H NMR）, infrared spectroscopy （FTIR）, UV-visible absorption and fluorescence. Similarities between the marine and freshwater components were evaluated on the basis of N and O contents, H/C and C/N atomic ratios, infrared bands from nitrogen-containing and carboxylic groups, percentage of functional groups obtained from NMR spectra, spectral slope coefficient of absorption spectra, absorbance ratios at 250 and 365 nm （EJE3）, aromaticity, excitation-emission matrices and fluorescence quantum yield. Both the Engano Bay and Chubut River waters have humic substances that are mainly composed of fulvic acids （FAs）; although they are very similar, they may be distinguished from one another Similarities include the predominance of aliphatic carbon content （low aromatic content）; however, the water bodies differed in their content of proteins and carboxylic acids. The Engano Bay fulvic acids have mainly an aquatic origin although the Chubut River fulvic acids suggest a similar aquagenic origin, there is also evidence of contributions from pedogenic fulvic acids