A voltammetric sensor based on graphene-modified electrode for simultaneous determination of catechol and hydroquinone

By Haijun Du, Jianshan Ye, Jiaqi Zhang, Xiaodan Huang, Chengzhong Yu. 2011

221 citations recorded by the source corpus.

In this report, a voltammetric sensor for simultaneous determination of hydroquinone (HQ) and catechol (CC) was developed at a glassy carbon electrode modified with graphene (GR/GCE). The separation of oxidation and reduction peak (Delta E) is decreased from 281 to 31 mV for HQ and from 250 to 26 mV for CC at GR/GCE, respectively. Separation of the oxidation peak potentials for HQ and C:C was about 112 mV in 0.10 M acetate buffer solution (pH 4.5), and the anodic currents for the oxidation of both HQ and CC are greatly increased at GR/GCE, which makes it suitable for simultaneous determination of these compounds. Under the optimized condition, the anodic peak current of HQ is linear with the concentration of HQ from 1 x 10(-6) to 5 x 10(-5) M in the presence of 5 x 10(-5) M CC. A detection limit of 1.5 x 10(-8) M (S/N = 3) can be achieved. At the same time, the anodic current of CC is linear with the concentration of CC from 1 x 10(-6) to 5 x 10(-5) M with a detection limit of 1.0 x 10(-8) M (S/N = 3) in the presence of 5 x 10(-5) M HQ. The proposed sensor was successfully applied to the simultaneous determination of HQ and CC in tap water, and the results are satisfactory. (C) 2010 Elsevier B.V. All rights reserved.

Subfields: Electrical and Electronic Engineering, Electrochemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/038f449efa035b672416c4fe0f92d71a15904d50

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

In Polymers and Plastics

K. Novoselov

Citations in the corpus

Graphene Sensors (2011, background): “[47] or the sensing of dopamine without the interference of”