Naslov
Electrochemical analysis of polysaccharides on mercury electrode in acetate buffer

Autori
Strmečki Kos, Slađana ; Paleček, Emil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6th ISE – SSRSE Book of Abstracts / Jozefina Katić - Zagreb : Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, 2016, 26-26

ISBN
978-953-6470-73-0

Skup
6th ISE Satellite Student Regional Symposium on Electrochemistry

Mjesto i datum
Zagreb, Hrvatska, 08.07.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Sulphated PS ; amino PS ; peak H ; chronopotentiometry ; acetate buffer

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

POVEZANOST RADA