Abstract
The surface of a gold (Au) disk electrode was modified with a self-assembled monomolecular layer of dithiobis(4-butylamino-m-phenylboronic acid) (DTBA-PBA) to prepare L-lactate-sensitive electrodes. The DTBA-PBA-modified electrodes exhibited an attenuated cyclic voltammogram (CV) for the Fe(CN)63- ion in the presence of L-lactate, as a result of the formation of phenylboronate ester of L-lactate accompanied with the addition of OH- ion to the boron atom. In other words, the negatively charged DTBA-PBA monolayer blocked the electrode surface from the access of the Fe(CN)63-/4- ions. Thus, the DTBA-PBA monolayer-modified Au electrode can be used for determining l-lactate on the basis of the change in redox current of Fe(CN)63-/4- ions. The calibration graph useful for determining 1 - 30 mM L-lactate was obtained.
Original language | English |
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Pages (from-to) | 816-818 |
Number of pages | 3 |
Journal | Electroanalysis |
Volume | 20 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2008 Apr 1 |
Keywords
- L-lactate
- Modified electrode
- Phenylboronic acid
- Self-assembled monolayer
ASJC Scopus subject areas
- Analytical Chemistry
- Electrochemistry