Analytical Sciences

Abstract − Analytical Sciences, 31(8), 773 (2015).

Detection of Several Carbohydrates Using Boron-doped Diamond Electrodes Modified with Nickel Hydroxide Nanoparticles
Milena E. TEIXEIRA, Graziela C. SEDENHO, and Nelson R. STRADIOTTO
Department of Analytical Chemistry, Institute of Chemistry, Universidade Estadual Paulista (UNESP), Rua Prof. Francisco Degni, 55, Araraquara, 14800-060, Brazil
In this work the electrooxidations of glucose, galactose, mannose, rhamnose, xylose and arabinose are studied at a nickel hydroxide nanoparticle modified boron-doped diamond electrode and compared to an unmodified electrode. These carbohydrates are very important in the second-generation ethanol production process. Nickel hydroxide modified boron-doped diamond was characterized by scanning electron microscopy and energy dispersive X-ray. Electrochemical impedance spectroscopy was employed to study the interface properties of surface-modified electrodes in the absence and presence of the carbohydrates. Limits of detection were 5.3 × 10−5, 6.8 × 10−5, 2.7 × 10−4, 6.9 × 10−5, 8.8 × 10−5 and 2.6 × 10−5 mol L−1 for glucose, galactose, mannose, rhamnose, arabinose, xylose, respectively.