A non-enzyme electrochemical qualitative and quantitative analyzing method for glucose, D-fructose, and sucrose utilizing Cu foam material

In this paper, a non-enzyme electrochemical qualitative and quantitative analyzing method for glucose, D-fructose, and sucrose utilizing Cu foam material was explored. Three-dimensional (3-D) Cu foam material was prepared by electrochemical deposition method, and used as working electrode in the detecting system. Scanning electron microscopy (SEM) imaging results revealed the excellent characteristics of Cu foam, such as porous space structure and large specific surface area, which benefited detecting sensitivity by effectively enlarging contact area between electrode and chemicals. The experiments were performed in a conventional three-electrode setup using an electrochemical workstation. Cyclic voltammetry (CV) method explained the electro-oxidation process occurred on Cu foam electrode. Amperometric scanning results demonstrated that the detecting system fast responded (less than 10s) to glucose, D-fructose, and sucrose in the linear concentration range from 0.18 mM to 3.47 mM with the significant sensitivity of 3.39748 mAcm (2)mM (1), 3.5811 mAcm (2)mM (1), and 0.93192 mAcm (2)mM (1), respectively. The limit of detection (LOD) is 12.96 mu M, 12.3 mu M, and 47.27 mu M for glucose, D-fructose, and sucrose, respectively (S/N = 3). Cu foam electrode selectively responds to glucose, D-fructose, and sucrose against non-reducing chemicals (KCl and ethyl alcohol). Stochastic resonance (SR) signal-to-noise ratio (SNR) spectrum presented qualitatively discriminating ability for glucose, D-fructose, and sucrose. (C) 2014 Elsevier Ltd. All rights reserved.