The principle of a simple time of flight (TOF) diffusion coefficient measuring method is presented. It is based on the special capability of Scanning Electrochemical Microscopy (SECM). Its applicability has been investigated experimentally in comparison with conventional electrochemical methods. Complex irreversible electrode processes usually bring in uncertainty into electrochemical diffusion coefficient measurements. One of these, the electrochemical oxidation of saccharides in basic media at a copper electrode, was selected for the studies. Microsize copper electrodes used also as SECM tip, and conventional size copper electrodes were used. Diffusion coefficients of d-glucose, d-arabinose, d-ribose, and d-galactose were measured. The results prove the advantages of the SECM-TOF method in the case investigated.
- Copper electrode
- Diffusion coefficient
- Electrochemical time of flight method (ETOF)
- Scanning electrochemical microscopy (SECM)
ASJC Scopus subject areas
- Analytical Chemistry