作　　者： ; ; ; ; ; ; ;

机构地区： 海南师范大学化学与化工学院

出　　处： 《分析化学》 2013年第5期709-713,共5页

摘　　要： 以六氟磷酸正己基吡啶为粘合剂和修饰剂,制备了离子液体修饰碳糊电极(CILE)。用电化学方法依次将纳米金和石墨烯(GR)电沉积在CILE表面制备了相应的修饰电极(GR/Au/CILE)。电极表面纳米金和GR的存在极大地提高了电极的电化学性能。进一步用循环伏安法、示差脉冲伏安法和计时库仑法等电化学方法研究了芦丁在GR/Au/CILE上的电化学行为,求解了相关的电化学参数。在最佳实验条件下,芦丁的氧化峰电流与其浓度在8.0×10"8～8.0×10"5mol/L范围内呈现良好的线性关系,检出限为2.55×10"8mol/L(3σ)。将本方法应用于复方芦丁片样品的测定,结果令人满意。 A carbon ionic liquid electrode （CILE） was prepared by using ionic liquid 1-hexylpyridinium hexafluorophosphate （ HPPF6 ） as the binder and the modifier, and then it was further decorated with gold nan- oparticles and graphene （GR） using step by step electrochemical method to get a modified electrode denoted as GR/Au/CILE. Electrochemical performance of GR/Au/CILE was greatly enhanced due to the presence of nano-gold and GR. Different electrochemical methods such as cyclic vohammetry, differential pulse voltamme- try and chronocoulometry were used to investigate the electrochemical behaviors of rutin on GR/Au/CILE with the electrochemical parameters calculated. Under the optimal conditions the oxidation peak current of rutin was proportional to its concentration in the range of 8.0×104-8.0×10-5 mol/L with the detection limit of 2.55×10-s mol/L （3σ）. The proposed method was applied to the analysis of rutin tablet with satisfactory results.

关 键 词： 离子液体修饰碳糊电极 石墨烯 纳米金 芦丁 电化学

领　　域： [理学] [理学]