A Boron Doped Diamond Electrode Modified with Nano‐carbon Black for the Sensitive Electrochemical Determination of Chlorogenic Acid

Abstract

An electrochemical method was developed for the sensitive determination of chlorogenic acid using a boron doped diamond electrode (BDDE) modified with nano‐carbon black (nano‐CB). The active surface areas were found to be 0.059 and 0.146 cm2 for the unmodified BDDE, and nano‐CB/BDDE, respectively. Compared with a BDDE, the nano‐CB/BDDE exhibited a well‐defined redox couple for chlorogenic acid. In addition, the plot of the peak current response changing from a square root to a linear dependence on scan rate is attributed to the transition from planar diffusion to surface behaviour. The anodic and cathodic peak separations (ΔEp) were 97 mV and 14 mV at BDDE and nano‐CB/BDDE, respectively. The decrease in ΔEp at the proposed electrode indicated that the process of chlorogenic acid was greatly accelerated. Square wave voltammetry (SWV) exhibited a dynamic range in which the current versus the concentration of chlorogenic acid were linear from 2.0×10−8 to 2.0×10−6 M with a LOD of 4.1×10−9 M (based on 3Sb/m). The nano‐CB modified BDDE provided improved electrochemical behavior, high electrocatalytic activity, high sensitivity and good reproducibility.

Application of Electrochemical Sensors Based on Carbon Nanomaterials for Detection of Flavonoids

“…The fabricated sensor showed satisfactory results with the lowest LOD (2 nM) and reliable linearity (0.01–75.46 μM). Then, Tugçe et al [ 66 ] developed a new electrochemical strategy to detect chlorogenic acid using an electrode modified with CB. Using SWV as the transduction technique, the authors studied the electrochemical properties.…”