基于二硼酸盐的电化学传感器用于无酶选择性和灵敏葡萄糖检测。
Diboronic-Acid-Based Electrochemical Sensor for Enzyme-Free Selective and Sensitive Glucose Detection.
机构信息
Drug Manufacturing Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80, Chumbok-ro, Dong-Gu, Daegu 41061, Republic of Korea.
Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80, Chumbok-ro, Dong-gu, Daegu 41061, Republic of Korea.
出版信息
Biosensors (Basel). 2023 Feb 9;13(2):248. doi: 10.3390/bios13020248.
A diboronic acid anthracene-based fluorescent system for detecting blood glucose could be used for 180 days. However, there has not yet been a boronic acid immobilized electrode to selectively detect glucose in a signal-increased way. Considering malfunctions of sensors at high sugar levels, the electrochemical signal should be increased proportionally to the glucose concentration. Therefore, we synthesized a new diboronic acid derivative and fabricated the derivative-immobilized electrodes for the selective detection of glucose. We performed cyclic voltammetry and electrochemical impedance spectroscopy with an Fe(CN) redox pair for detecting glucose in the range of 0-500 mg/dL. The analysis revealed increased electron-transfer kinetics such as increased peak current and decreased semicircle radius of Nyquist plots as the glucose concentration increased. The cyclic voltammetry and impedance spectroscopy showed that the linear detection range of glucose was 40 to 500 mg/dL with limits of detection of 31.2 mg/dL and 21.5 mg/dL, respectively. We applied the fabricated electrode to detect glucose in artificial sweat and obtained 90% of the performance of the electrodes in PBS. Cyclic voltammetry measurements of other sugars such as galactose, fructose, and mannitol also showed linear increased peak currents proportional to the concentrations of the tested sugars. However, the slopes of the sugars were lower than that of glucose, indicating selectivity for glucose. These results proved the newly synthesized diboronic acid is a promising synthetic receptor for developing a long-term usable electrochemical sensor system.
一种基于二硼酸蒽的荧光体系可用于检测血糖达 180 天。然而,目前还没有硼酸固定化电极以信号增强的方式选择性地检测葡萄糖。考虑到传感器在高糖水平下的故障,电化学信号应与葡萄糖浓度成比例增加。因此,我们合成了一种新的二硼酸衍生物,并制备了衍生化固定化电极,用于选择性检测葡萄糖。我们使用 Fe(CN) 氧化还原对进行循环伏安法和电化学阻抗谱分析,以检测 0-500mg/dL 范围内的葡萄糖。分析表明,随着葡萄糖浓度的增加,电子转移动力学得到了增强,如峰电流增加和奈奎斯特图的半圆半径减小。循环伏安法和阻抗谱表明,葡萄糖的线性检测范围为 40 至 500mg/dL,检测限分别为 31.2mg/dL 和 21.5mg/dL。我们将制备的电极应用于人工汗液中的葡萄糖检测,得到了与在 PBS 中电极性能相当的 90%。对其他糖,如半乳糖、果糖和甘露醇的循环伏安法测量也显示出与测试糖浓度成正比的线性增加的峰电流。然而,这些糖的斜率低于葡萄糖,表明对葡萄糖具有选择性。这些结果证明,新合成的二硼酸是开发长期可用的电化学传感器系统的有前途的合成受体。