基于 8-硝基喹啉涂层铅笔石墨电极的新型、选择性、快速电化学传感器用于测定橙汁中的芦丁

IF 3.1 4区工程技术 Q2 ELECTROCHEMISTRY

Journal of The Electrochemical Society Pub Date : 2024-09-03 DOI:10.1149/1945-7111/ad7325

Farah En-Nakra, Demet Uzun, Erdoğan Hasdemir

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引用次数: 0

摘要

在这项研究中，我们开发了一种简便、低成本的方法，通过在铅笔石墨电极（PGE）表面涂覆 8-硝基喹啉（8-NQ）来制备改性电极。表面改性过程是在乙醇溶液中通过电化学还原 8-NQ 在铅笔石墨电极表面上进行的。实验研究确定了最佳条件。使用改性电极（8-NQ/PGE）进行微分脉冲伏安法测定芦丁。所开发的电极在 pH 值为 3.0 的布里顿罗宾逊缓冲液（BR）中显示出优异的芦丁氧化性能。在该介质中，随着芦丁浓度在两个较宽的浓度范围内（即 0.016-0.96 μM 和 0.96-19.73 μM）的增加，阳极峰电流呈线性增加，传感器显示出较低的检测限（即 4.14 nM）（3 s m-1）。它具有良好的稳定性和选择性。此外，它还成功地用于测定橙汁样品中的芦丁。

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A Novel, Selective, and Fast Electrochemical Sensor Based on an 8-Nitroquinoline-Coated Pencil Graphite Electrode for Rutin Determination in Orange Juice

In this study, we developed a facile and low-cost method to prepare a modified electrode by coating the pencil graphite electrode (PGE) surface with 8-nitroquinoline (8-NQ). The surface modification process was carried out by electrochemical reduction of 8-NQ on the PGE surface in ethanol solution. The optimum conditions were determined for the experimental studies. The differential pulse voltammetry was used to determine rutin with the modified electrode (8-NQ/PGE). The developed electrode showed excellent performance for rutin oxidation in a pH 3.0 Britton Robinson buffer (BR). In this media, linearly increasing anodic peak currents were observed with the concentration of rutin in two wide concentration ranges (i.e., 0.016–0.96 μM and 0.96‒19.73 μM), the sensor showed a low detection limit (i.e., 4.14 nM) (3 s m⁻¹). It displayed good stability and selectivity. Also, it was used successfully for the determination of rutin in orange juice samples.

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来源期刊

Journal of The Electrochemical Society 工程技术-电化学

CiteScore

7.20

自引率

12.80%

发文量

1369

审稿时长

1.5 months

期刊介绍： The Journal of The Electrochemical Society (JES) is the leader in the field of solid-state and electrochemical science and technology. This peer-reviewed journal publishes an average of 450 pages of 70 articles each month. Articles are posted online, with a monthly paper edition following electronic publication. The ECS membership benefits package includes access to the electronic edition of this journal.