Graphene Modified Glassy Carbon Electrode for Selective Determination of Metol in the Presence of Hydroquinone

doi:10.11944/j.issn.1000-0518.2016.01.150390

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (1): 103-107.DOI: 10.11944/j.issn.1000-0518.2016.01.150390

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Graphene Modified Glassy Carbon Electrode for Selective Determination of Metol in the Presence of Hydroquinone

ZHANG Ya^a^*(),ZHENG Jianbin^b

^aDepartment of Chemistry and Chemical Engineering,Yulin College,Yulin,Shaanxi 719000,China
^bInstitute of Analytical Science,Northwest University,Xi'an 710069,China

Received:2015-01-23 Accepted:2015-05-29 Published:2016-01-05 Online:2016-01-05
Contact: ZHANG Ya
Supported by:
Supported by the Natural Science Foundation of Shaanxi Province(No.2013JM2017), the Foundation of Science and Technology of Yulin(No.2014cxy-08)

Abstract

Abstract:

A graphene modified glassy carbon electrode(GN/GCE) was prepared. The electrochemical behavior of metol at the modified electrode was investigated in 0.5 mol/L HAc-NaAc(pH=4.8) buffer solution by cyclic voltammetry(CV) and square wave voltammetry(SWV), and a novel method for the determination of metol was established. The results show that the redox peak potential difference of metol on GN/GCE is smaller than that on the bare GCE, while the peak current is significantly increased, indicating that the GN/GCE has electrocatalytic activity toward the redox of metol. A linear dependence of the reduction current versus the metol concentration using SWV is obtained in the range of 8.0×10^-8~5.0×10^-5 mol/L, with a detection limit of 2.0×10^-8 mol/L. The concomitant hydroquinone affects on the detection of metol, but the interference can be eliminated by using the SWV method. The proposed method can be used to determine metol in photographic imaging agents.

Key words: metol, graphene, modified electrode, electrocatalysis

ZHANG Ya, ZHENG Jianbin. Graphene Modified Glassy Carbon Electrode for Selective Determination of Metol in the Presence of Hydroquinone[J]. Chinese Journal of Applied Chemistry, 2016, 33(1): 103-107.

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Graphene Modified Glassy Carbon Electrode for Selective Determination of Metol in the Presence of Hydroquinone

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