Capillary zone electrophoretic studies on Norwegian surface water natural organic matter

Philippe Schmitt-Kopplin, Dieter Freitag, Antonius Kettrup, Ursula Schoen, Per Kr Egeberg

Research output: Contribution to journalConference articlepeer-review

16 Scopus citations


Capillary zone electrophoresis (CZE) is a useful tool for the analysis of the electrophoretic behavior of anionic polyelectrolytes like humic substances. CZE was used to compare natural organic matter (NOM) with high ash content obtained by reverse osmosis (RO) and low temperature, low pressure evaporation (Ev.) from different Norwegian surface water sources. The quantitative relation between the resulting electrophoretic sign (peak height and area) and the carbon amount of the injected NOM samples was found linear. The NOM gave homogeneous signals in CZE, with a distribution of the detection signals around an average electrophoretic mobility (AEM) corresponding to the charge density distribution of the NOM, governed by the distribution of their molecular sizes and acidities. Like humic substances, NOM only appears as anions in capillary electrophoresis (CE), but the high ash content of these samples and the presence of metals strongly influenced their mobilities at lower pH. CZE could be used as a tool for the rapid evaluation of the average net charge and the molecular radius of the NOM at pH 5.1.

Original languageEnglish
Pages (from-to)259-274
Number of pages16
JournalEnvironment International
Issue number2-3
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1998 Workshop on Typing of Natural Organic Matter in Water - Krsitiansand, Norway
Duration: 3 Jun 19986 Jun 1998


Dive into the research topics of 'Capillary zone electrophoretic studies on Norwegian surface water natural organic matter'. Together they form a unique fingerprint.

Cite this