Fluorescence spectroscopy applied to the optimisation of a desalting step by electrodialysis for the characterisation of marine organic matter |
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Authors: | A. Huguet H. Roux-de Balmann E. Parlanti |
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Affiliation: | 1. Université de Bordeaux, UMR 5255, ISM-LPTC, 351 cours de la Libération, Talence F-33405, France;2. CNRS, UMR 5255, ISM-LPTC, Talence F-33405, France;3. Université Paul Sabatier, Laboratoire de Génie Chimique, CNRS, UMR 5503, Toulouse F-31602, France |
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Abstract: | The isolation and characterisation of marine dissolved organic matter (DOM) are still not readily achieved today. The study of this chemically complex material is particularly difficult, especially as it is hindered by the high salinity of seawater. It is therefore essential to develop a method in which a sufficient quantity of marine organic matter can be collected for structural analyses. Reverse osmosis (RO) is often used for the concentration of DOM from freshwaters, due to the fact that DOM is not modified during RO and that DOC recoveries are high (about 80%). Unfortunately, RO cannot be used directly to isolate marine DOM, since both salts and organic matter are concentrated during the process. Therefore, marine samples have to be desalted before their concentration by RO. |
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Keywords: | Seawater Dissolved organic matter Electrodialysis Spectrofluorometry |
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