Zdrojový dokument:Sensing in electroanalysis. K. Vytřas, K. Kalcher, I. Švancara (Eds.). 2010, Volume 5.
Abstrakt:
Elimination voltammetry with linear scan (EVLS) represents the fast and simple
improvement of linear-sweep or cyclic voltammetric results. Through the various elimination
functions, EVLS offers a new tool not also for better understanding of complex electrochemical
processes on the surface of working electrodes, but also for improving the
sensitivity of electrochemical measurements. The paper is mainly focused on the elimination
function 'E4', which eliminates the kinetic and charging current components and conserves the
diffusion one from a total current measured. It was found that this function has the most
sensitive and separation ability in the case of adsorptive electroactive species. The strength of
combination of EVLS with an adsorptive stripping technique was demonstrated by the
enhancement and resolution of overlapped reduction signals of adenine and cytosine residues
in short synthetic oligonucleotides (ODN) and DNA at the hanging mercury drop electrode.
Two EVLS modes single and double are presented and their detection capabilities in
analytical systems discussed.