An ex situ electrocatalytic analysis of κ-, ι-, and λ-carrageenan on mercury electrode in seawater (CROSBI ID 197509)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Strmečki, Slađana ; Plavšić, Marta
engleski
An ex situ electrocatalytic analysis of κ-, ι-, and λ-carrageenan on mercury electrode in seawater
Sulphated polysaccharides κ-, ι-, and λ-carrageenan were analysed in seawater by applying adsorptive transfer constant current derivative chronopotentiometric stripping (AdT CPS) method on mercury electrode. Accelerated faradaic (catalytic) nature of the peak (peak HPS) recorded at negative potential was confirmed for all three carrageenans using specific electrochemical criteria. The effect of chronopotentiometric parameters (accumulation potential, accumulation time and stripping current) on the peak HPS height was evaluated for each carrageenan. Optimal CPS parameters for AdT CPS analysis of particular carrageenan in seawater were defined. Regarding the AdT CPS of carrageenans mixture, only λ-carrageenan could be successfully measured in the mixture with ι- and/or κ-carrageenan. This is the first electroanalytical study of a model mixture of sulphated polysaccharides in seawater and it is of great importance for the analysis of organic matter in seawater, especially acidic polysaccharides containing sulphate groups in the structure.
adsorptive transfer; carrageenans; chronopotentiometry; peak H_PS; seawater; square wave voltammetry
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Podaci o izdanju
712
2014.
1-7
objavljeno
1572-6657
10.1016/j.jelechem.2013.10.023