Abstract − Analytical Sciences, 20(5), 757 (2004).
Voltammetric Response of Phenylboronic Acid Monolayer-modified Gold Electrode to Sugars
Shigehiro TAKAHASHI, Yoshitomo KASHIWAGI, Tomonori HOSHI, and Jun-ichi ANZAI
Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan
The surface of a gold (Au) disk electrode was modified with a self-assembled monolayer consisting of phenylboronic acid moiety to fabricate a voltammetric sensor sensitive to sugars. The modified Au electrode exhibited a voltammetric response to sugars in the presence of Fe(CN)63- ion in the sample solution at neutral pH. The peak current of the cyclic voltammograms decreased depending on the type and oncentration of sugars. The dynamic range of the electrode is 3 - 100 mM for glucose and mannose and 1 - 30 mM for fructose. The sugar sensor can be used repeatedly after rinsing in 10 mM acetate buffer (pH 4.5).
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