Electrochemical analysis of polysaccharides on mercury electrode in acetate buffer (CROSBI ID 641390)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Strmečki Kos, Slađana ; Paleček, Emil
engleski
Electrochemical analysis of polysaccharides on mercury electrode in acetate buffer
Polysaccharides (PSs) are considered as an electrochemically inactive organic molecules. However, PSs carrying sulphate or amino groups after adsorption on the hanging mercury drop electrode (HMDE) in the acetate buffer produce catalytic peak in voltammetric methods (such as square wave and cyclic voltammetry) and constant current chronopotentiometric stripping (CPS) method. Catalytic peak of PSs is due to the catalytic hydrogen evolution reaction and is called “peak H” when observed in CPS. Here we show that CPS peak H of sulphated PS and amino group-containing PS (Ep around -1.8 V) is accompanied by a decrease of capacitive current in out of phase alternate current voltammetry (ACV) below the background electrolyte close to -1.8 V. Such decrease of capacitive current suggested strong adsorption of sulphated PS and amino PS at the negatively charged HMDE in acetate buffer, pH 5.6. Compared to sulphated PS and amine PS, neutral PS did not produce peak H and did not adsorb at negative potentials.
Sulphated PS ; amino PS ; peak H ; chronopotentiometry ; acetate buffer
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Podaci o prilogu
26-26.
2016.
objavljeno
Podaci o matičnoj publikaciji
6th ISE – SSRSE Book of Abstracts
Jozefina Katić
Zagreb: Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu
978-953-6470-73-0
Podaci o skupu
6th ISE Satellite Student Regional Symposium on Electrochemistry
predavanje
08.07.2016-08.07.2016
Zagreb, Hrvatska