Electrochemical Analysis of Carrageenans. The Effect of Acetate Concentration

0506688 - BFÚ 2020 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kos, S.S. - Paleček, Emil
Electrochemical Analysis of Carrageenans. The Effect of Acetate Concentration.
XXXVI. Moderní elektrochemické metody. Sborník přednášek. Ústí nad Labem: Best servis, 2016 - (Navrátil, T.; Fojta, M.; Schwarzová, K.), Č. 2016 (2016), s. 215-219. ISBN 978-80-905221-4-5.
[Moderní elektrochemické metody /36./. Jetřichovice (CZ), 23.05.2016-27.05.2016]
Grant CEP: GA ČR(CZ) GA15-15479S
Institucionální podpora: RVO:68081707
Klíčová slova: polysaccharides * carageenans * chronopotentiometry * peak H-ps
Obor OECD: Physical chemistry

kappa-, iota-, and lambda-carrageenans are polysaccharides (PSs) which produce electrocatalytic chronopotentiometric peak H-ps in acetate buffer (pH 5.2) on the hanging mercury drop electrode (HMDE). Here we show that this peak (E-p1.8V) increases with the acetate concentration Using a. c. voltammetry we found that the appearance and the observed increase of peak H-PS is accompanied by a decrease of capacitive current below the background elecnolyte around1.8 V, suggesting strong adsorption of the negatively charged PS at the negatively charged HMDE. Compared to carrageenany dextran did not produce peak H-PS and did not strongly adsorb at negatively charged electrode.
Trvalý link: http://hdl.handle.net/11104/0297886