Naslov
Electrochemical analysis of carrageenans. The effect of acetate concentration.

Autori
Strmečki Kos, Slađana ; Paleček, Emil

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the International Conference XXXVI Modern Electrochemical Methods / Navratil, Tomas ; Fojta, Miroslav ; Schwarzova, Karolina - Ústí na Labi : Srsenova Lenka-Best servis Usti nad Labem, 2016, 215-219

ISBN
978-80-905221-4-5

Skup
XXXVI Modern Electrochemical Methods

Mjesto i datum
Jetřichovice, Češka Republika, 23.05.2016. - 27.05.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
carrageenans ; chronopotentiometry ; peak H ; a. c. voltammetry ; acetate buffer

Sažetak
κ-, ι-, and λ-carrageenans are polysaccharides (PSs) which produce electrocatalytic chronopotentiometric peak H in acetate buffer (pH 5.2) on the hanging mercury drop electrode (HMDE). Here we show that this peak (Ep~-1.8V) increases with the acetate concentration. Using a. c. voltammetry we found that the appearance and the observed increase of peak H is accompanied by a decrease of capacitive current below the background electrolyte around -1.8 V, suggesting strong adsorption of the negatively charged PS at the negatively charged HMDE. Compared to carrageenans, dextran did not produce peak H and did not strongly adsorb at negatively charged electrode.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti

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