Electrochemical Behaviors of Hydroquinone on a Carbon Paste Electrode with Ionic Liquid as Binder

Bulletin of the Korean chemical society

Qiang Jiang¹  Maoxia Yang¹  Wei Sun¹  Kui Jiao¹ 

关键词: Hydroquinone;    Ionic liquid;    Carbon paste electrode;    Electrochemistry;    Cyclic voltammetry;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In this paper the electrochemical behaviors of hydroquinone (H₂Q) were investigated on a carbon paste electrode using room temperature ionic liquid N-butylpyridinium hexafluorophosphate (BPPF₆) as binder (ILCPE) and further applied to H₂Q determination. In pH 2.5 phosphate buffer solution (PBS), the electrochemical response of H2Q was greatly improved on the IL-CPE with a pair of well-defined quasi-reversible redox peaks appeared, which was attributed to the electrocatalytic activity of IL-CPE to the H₂Q. The redox peak potentials were located at 0.340 V (Epa) and 0.240 V (Epc) (vs. the saturated calomel electrode, SCE), respectively. The formal potential (E^0`) was calculated as 0.290 V and the peak-to-peak separation (ツE_p) was 0.100 V. The electrochemical parameters of H2Q on the IL-CPE were further calculated by cyclic voltammetry. Under the selected conditions the anodic peak current was linear with H₂Q concentration over the range from 5.0 �? 10^?6 to 5.0 �? 10^?3 mol L^?1 with the detection limit as 2.5 �? 10^?6 mol L^?1 (3�? ) by cyclic voltammetry. The proposed method was successful applied to determination of H2Q content in a synthetic wastewater sample without the interferences of commonly coexisting substances.

【 授权许可】

Unknown