Journal
WATER RESEARCH
Volume 45, Issue 2, Pages 879-885Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2010.09.023
Keywords
Humic substances; Fulvic acids; Humic acids; HS-diagram; Organic carbon detector; SEC; Nitrogen detector; Biopolymers; EfOM
Funding
- German Federal Ministry of Education and Research (BMBF, Bundesministerium fur Bildung und Forschung) [02WT0724]
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Size-exclusion chromatography in combination with organic carbon detection (SEC-OCD) is an established method to separate the pool of NOM into major fractions of different sizes and chemical functions and to quantify these on the basis of organic carbon. One specific approach, also known as LC-OCD-OND, is based on the Grantzel thin-film UV-reactor. This approach is described with recent improvements in fraction assignation (humic substances, biopolymers, building blocks, low molecular weight organic acids and neutrals, hydrophobic organic carbon), the coupling of a novel organic nitrogen detector (OND), and an improved diagram for the characterisation of aquatic humic substances (HS-diagram). The diagram replaces the operational distinction between humic and fulvic acids by a continuum ranging from aquagenic fulvic acids to pedogenic humic acids. (C) 2010 Elsevier Ltd. All rights reserved.
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