Application of multielectrode array modified with carbon nanotubes to simultaneous amperometric determination of dihydroxybenzene isomers

作者：Zhang Dongdong; Peng Yage; Qi Honglan; Gao Qiang; Zhang Chengxiao^*

来源：Sensors and Actuators B: Chemical , 2009, 136(1): 113-121.

DOI：10.1016/j.snb.2008.11.010

• Multielectrode array
• Electroanalysis
• Carbon nanotubes
• Simultaneous determination
• Dihydroxybenzene isomers

A novel multielectrode array modified with multiwall carbon nanotubes (MWCNTs) to simultaneous amperometric determination of dihydroxybenzene isomers was designed. The three oxidation peaks at the multielectrode array fabricated in 0.10 M KCl-0.20 M acetate buffer solution (pH 5.40) containing hydroquinone, catechol and resorcinol appeared at +0.192 V, +0.301 V and +0.683 V, corresponding to the oxidation of hydroquinone, catechol and resorcinol, respectively. A simple electrochemical method for simultaneous determination of dihydroxybenzene isomers was developed by multiple linear regression (MLR) method. Under the optimized conditions, the amperometric currents were linear over ranges from 1.0 x 10(-6) M to 1.0 x 10(-4) M for hydroquinone, from 1.0 X 10(-6) M to 1.0 X 10(-4) M for catechol and from 6.0 x 10-6 M to 1.0 x 10(-4) M for resorcinol, with the detection limits of 3.0 x 10(-7) M. 2.0 x 10(-7) M and 6.0 x 10(-7) M, respectively. The developed method has been applied to simultaneous determination of dihydroxybenzene isomers in artificial wastewater with a satisfactory recovery from 97% to 101%. This work demonstrates that the MWCNTs-modified multielectrode array incorporating multiple linear regression method is a promising strategy for simultaneous electrochemical determination of isomers of organic compounds.

• 出版日期2009-2-2
• 单位陕西师范大学