Constant current chronopotentiometric stripping of sulphated polysaccharides

Strmečki, Slađana; Plavšić, Marta; Ćosović, Božena; Ostatna, Veronika; Paleček, Emil (2009) Constant current chronopotentiometric stripping of sulphated polysaccharides. Electrochemistry Communications, 11 (10). pp. 2032-2035. ISSN 1388-2481

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Abstract

We show that electrochemically inactive molecules of polysaccharide (PS), if carrying sulphated groups (e.g. i-carrageenan and dextran sulphate) produce in buffered solutions two well-developed chronopotentiometric peaks HPS and H0PS (due to catalytic hydrogen evolution) at hanging mercury drop electrode.Peak HPS of i-carrageenan displayed a striking increase at negative accumulation potentials, which was tentatively explained by uncoiling the PS double-helical structure at these potentials. Nanomolar concentrations of i-carrageenan can be determined at moderate accumulation times.

Item Type:	Article
Uncontrolled Keywords:	sulphated polysaccharides; i-Carrageenan; catalysis of hydrogen evolution; constant current chronopotentiometric stripping; Mercury electrode
Subjects:	NATURAL SCIENCES > Interdisciplinary Natural Sciences NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Priroda organske tvari, interakcije s mikrokonstituentima i površinama u okolišu- Irena Ciglenečki-Jušić 098-0982934-2717 MZOS Grant Agency of the Czech Republic UNSPECIFIED 301/07/0490 FP7 Grant Agency of the Czech Republic UNSPECIFIED 202/07/P497 FP7 UNSPECIFIED UNSPECIFIED AVOZ50040507 FP7 UNSPECIFIED UNSPECIFIED AVOZ50040702 FP7
Depositing User:	Slađana Strmečki Kos
Date Deposited:	21 Dec 2016 12:24
URI:	http://fulir.irb.hr/id/eprint/1949
DOI:	10.1016/j.elecom.2009.08.056

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