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首页> 外文期刊>International Journal of Electrochemical Science >Amperometric Detection of Hydroquinone at Modified Ionic Liquid Graphene Composite Paste Electrode
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Amperometric Detection of Hydroquinone at Modified Ionic Liquid Graphene Composite Paste Electrode

机译：改性离子液体石墨烯复合糊电极的安培检测。

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摘要

The ionic liquid 1-ethyl-3-methylimidazolium bromide (EMIMBr) based graphene composite pasteelectrode (GrPE) was fabricated and applied for the determination of hydroquinone. By using squarewave voltammetry, the electrochemical response of hydroquinone on EMIMBr-GrPE was greatlyenhanced in 0.7 M phosphate buffer solution (pH 7.0). Under optimized conditions, the proposed-6 -2 electrode showed a linear relationship with concentration in the range of 1.010 to 1.010 M-7 2+ 2+ + + 3- hydroquinone with limit of detection of 2.7710 M. The interferences of Ba , Cu , Na , K , NO ,- 2- Cl , SO4 , glycine, glucose, fructose and sucrose were negligible. Electrochemical impedancespectroscopy indicated that the charge transfer at the electrode-solution interface was excellent. Theproposed electrode was successfully applied to determine of hydroquinone in wastewater and cosmeticcreams with range of recovery 97 104%.
机译：制备了基于离子液体的1-乙基-3-甲基咪唑鎓溴化物（EMIMBr）的石墨烯复合糊状电极（GrPE），并将其用于对苯二酚的测定。通过使用方波伏安法，在0.7 M磷酸盐缓冲溶液（pH 7.0）中大大增强了对苯二酚在EMIMBr-GrPE上的电化学响应。在最佳条件下，建议的-6 -2电极与浓度在1.010至1.010 M-7 2+ 2+ + + 3-对苯二酚之间呈线性关系，检出限为2.7710M。Ba，Cu的干扰Na，K，NO，-2-Cl，SO4，甘氨酸，葡萄糖，果糖和蔗糖微不足道。电化学阻抗谱表明，电极-溶液界面处的电荷转移非常好。该电极成功用于废水和美容霜中对苯二酚的测定，回收率97 104％。

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