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Electrochemical estimation of the dominant type of surface active substances in seawater samples using o-nitrophenol as a probe

Gašparović, Blaženka; Ćosović, Božena (1994) Electrochemical estimation of the dominant type of surface active substances in seawater samples using o-nitrophenol as a probe. Marine chemistry, 46 (1-2). pp. 179-188. ISSN 0304-4203

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Abstract

A simple electrochemical method is developed for direct estimation of the concentration and nature of the dominant type of surface active substances (SAS) in natural waters using o-nitrophenol (ONP) as a probe. It was noticed from studies of model systems of selected adsorbable organic substances (humic and fulvic acids, carbohydrates, proteins and lipids), representative of the chemical composition of organic matter in natural waters, that different surface active molecules influence the polarographic oxidation-reduction precesses of ONP in very specific ways. This is indicated by different shapes and peakpotentials as well as by the change of the peak height of the ONP reduction peak in the presence of different SAS. The application of the method is demonstrated on a number of seawater samples collected at different locations, depths and seasons in the Adriatic sea. Results were compared with the measurements of surfactant activity values by alternating current voltammetry and discused on the basis of the DOC values of the samples.

Item Type: Article
Uncontrolled Keywords: surface active substances; seawater; o-nitrophenol
Subjects: NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Division for Marine and Enviromental Research
Projects:
Project titleProject leaderProject codeProject type
Priroda i reaktivnost organskih tvari u moru i kopnenim vodaBožena Ćosović00981503MZOS
Depositing User: Blaženka Gašparović
Date Deposited: 06 Jul 2016 11:55
Last Modified: 06 Jul 2016 11:55
URI: http://fulir.irb.hr/id/eprint/2890
DOI: 10.1016/0304-4203(94)90054-X

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