| dc.description.abstract | In this thesis, cyclic biamperometry (CB) as a new method in electrochemistry,
has been introduced and investigated. The hallmark of this method is the absence
of a reference electrode which potentially allows simplification and miniaturization
of the measurement apparatus. Similarities and differences of this method and
cyclic voltammetry (CV) have been studied and it was shown that under conditions
of using standard electrodes, CB has a better sensitivity and a lower detection
limit than CV. A new equivalent circuit model for the cell has been proposed and
parameters affecting the sensitivity of CB, such as keeping the concentration of
one redox species in excess and having a larger W2 electrode, have been described.
The redox cycling effect in biamperometric systems has been investigated and it
is shown that improvements of at least two orders of magnitude in sensitivity can
be achieved by using interdigitated electrodes (IDEs). In addition, an example
for applications of this method, including biamperometric dead-stop titration of
1-naphthol with ferricyanide, has been presented and possible fields in which CB can
be incorporated (e.g. monitoring the activity of alkaline phosphatase) have been
illustrated. Finally, a few suggestions for future studies and further improvements
have been outlined. | en |
