Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Shandong University, Jinan 250000, China.
Talanta. 2010 Oct 15;82(5):1853-7. doi: 10.1016/j.talanta.2010.07.083. Epub 2010 Aug 7.
An ionic liquid (IL) modified carbon ceramic electrode (CCE) was designed and further used for the voltammetric detection of rutin in this paper. IL-CCE was prepared by mixing graphite powder with 1-butyl-3-methylimidazolium tetrafluoroborate (EMIMBF(4)) doped silicate sol-gel matrix together and further characterized by different methods. Then electrochemical behaviors of rutin on the IL-CCE were investigated by different electrochemical methods such as cyclic voltammetry and differential pulse voltammetry (DPV). Due to the presence of IL in the CCE, an enhanced electrochemical response of rutin appeared with a pair of well-defined redox peaks in pH 2.5 phosphate buffer solution (PBS). The electrochemical behaviors of rutin on the IL-CCE were carefully investigated. Under the selected conditions the oxidation peak currents exhibited good linear relationship with the rutin concentration in the range from 0.3 to 100.0 μmol/L with the detection limit as 0.09 μmol/L (3σ). The proposed method was further applied to the rutin tablets sample detection with satisfactory results.
本文设计了一种离子液体（IL）修饰的碳陶瓷电极（CCE），并进一步用于芦丁的伏安法检测。IL-CCE 通过将石墨粉末与 1-丁基-3-甲基咪唑四氟硼酸盐（EMIMBF（4））掺杂的硅溶胶凝胶基质混合在一起制备，并通过不同的方法进行进一步表征。然后通过循环伏安法和差分脉冲伏安法（DPV）等不同的电化学方法研究了芦丁在 IL-CCE 上的电化学行为。由于 CCE 中存在 IL，芦丁在 pH 2.5 磷酸盐缓冲溶液（PBS）中出现一对定义良好的氧化还原峰，其电化学响应得到增强。仔细研究了芦丁在 IL-CCE 上的电化学行为。在选定的条件下，氧化峰电流在 0.3 至 100.0 μmol/L 的范围内与芦丁浓度呈良好的线性关系，检测限为 0.09 μmol/L（3σ）。该方法进一步应用于芦丁片剂样品的检测，结果令人满意。
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