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2014•Analytical MethodsRequires access

The electrocatalytic characteristics of poly(azure B) and its application in the sensitive determination of hydroquinone

Yong Kong, Jie Ou, Zhong Liu, Shengkai Xue, Yongxin Tao, Jianfeng Ma

Open publisher page 11 citations

Abstract

Poly(azure B) (PAB) electropolymerized on a glassy carbon electrode (GCE) can effectively catalyze the oxidation and reduction of hydroquinone (HQ), with PAB acting as an electron transfer mediator. Compared with a bare GCE, the PAB-modified GCE significantly enhances the peak current and reduces the oxidation peak potential of HQ. The current of HQ on the PAB-modified GCE is proportional to its concentration, and thus provides an efficient approach for the determination of HQ. Under optimal conditions, the PAB-modified GCE displays a linear response for 8 to 4000 μM HQ, and the detection limit is 4.8 μM (S/N = 3). Moreover, it was found that catechol, an important isomer of HQ, does not interfere in the determination of HQ using the PAB-modified GCE.

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What this paper is about

Poly(azure B) (PAB) electropolymerized on a glassy carbon electrode (GCE) can effectively catalyze the oxidation and reduction of hydroquinone (HQ), with PAB acting as an electron transfer mediator. Compared with a bare GCE, the PAB-modified GCE significantly enhances the peak current and reduces the oxidation peak potential of HQ. The current of HQ on the PAB-modified GCE is proportional to its concentration, and thus provides an efficient approach for the determination of HQ. Under optimal conditions, the PAB-modified GCE displays a linear response for 8 to 4000 μM HQ, and the detection limit is 4.8 μM (S/N = 3). Moreover, it was found that catechol, an important isomer of HQ, does not interfere in the determination of HQ using the PAB-modified GCE.

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Available abstract

Poly(azure B) (PAB) electropolymerized on a glassy carbon electrode (GCE) can effectively catalyze the oxidation and reduction of hydroquinone (HQ), with PAB acting as an electron transfer mediator. Compared with a bare GCE, the PAB-modified GCE significantly enhances the peak current and reduces the oxidation peak potential of HQ. The current of HQ on the PAB-modified GCE is proportional to its concentration, and thus provides an efficient approach for the determination of HQ. Under optimal conditions, the PAB-modified GCE displays a linear response for 8 to 4000 μM HQ, and the detection limit is 4.8 μM (S/N = 3). Moreover, it was found that catechol, an important isomer of HQ, does not interfere in the determination of HQ using the PAB-modified GCE.

Key concepts: Hydroquinone, Catechol, Detection limit, Chemistry, Electron transfer, Redox, Electrode, Nuclear chemistry

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