The performances of ionic liquid (1-hexyl-3-methylimidazolium-bis(trifluoromethylsulfonyl)imide, IL/CPE) and iron phthalocyanine (IP/CPE) modified carbon paste electrodes in electroanalytical determinations of rutin were evaluated and compared to the performance of unmodified carbon paste electrode (CPE). Cyclic voltammetry (CV), differential pulse voltammetry (DPV), differential pulse adsorptive stripping voltammetry (DPAdSV), and amperometry were used for rutin analysis. The best current responses of rutin were obtained at pH 4.0 for all tested techniques. IL/CPE electrode was found to perform best with DPAdSV technique, where a detection limit (LOD) as low as 5 nmol L−1 of rutin was found. On the other hand, IP/CPE showed itself to be an optimum choice for DPV technique, where LOD of 80 nmol L−1 was obtained. Analytical applicability of newly prepared electrodes was demonstrated on determination of rutin in the model samples and the extracts of buckwheat seeds. To find an optimum method for buckwheat seeds extraction, a boiling water extraction (BWE), Soxhlet extraction (SE), pressurized solvent extraction (PSE), and supercritical fluid extraction (SFE) were tested.
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机译：评估了离子液体（1-己基-3-甲基咪唑鎓-双（三氟甲基磺酰基）酰亚胺，IL / CPE）和酞菁铁（IP / CPE）修饰的碳糊电极在芦丁的电分析中的性能，并将其与未修饰的性能进行了比较碳糊电极（CPE）。循环伏安法（CV），差分脉冲伏安法（DPV），差分脉冲吸附溶出伏安法（DPAdSV）和安培法用于芦丁分析。对于所有测试技术，芦丁的最佳电流响应均在pH值4.0时获得。发现IL / CPE电极在DPAdSV技术下表现最佳，发现芦丁的检出限（LOD）低至5 nmol L -1 。另一方面，IP / CPE本身是DPV技术的最佳选择，其LOD为80 nmol L -1 。通过测定模型样品和荞麦种子提取物中的芦丁，证明了新制备的电极的分析适用性。为了找到提取荞麦种子的最佳方法，对沸水提取（BWE），索氏提取（SE），加压溶剂提取（PSE）和超临界流体提取（SFE）进行了测试。
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