Zou Hui-Yu, Lu Xin-Yang, Kong Fen-Ying, Wang Zhong-Xia, Li Heng-Ye, Fang Hai-Lin, Wang Wei
School of Chemistry and Chemical Engineering, Jiangsu University Zhenjiang 212013 China.
School of Chemistry and Chemical Engineering, Yancheng Institute of Technology Yancheng 224051 China
RSC Adv. 2020 Jul 28;10(47):28026-28031. doi: 10.1039/d0ra04976j. eCollection 2020 Jul 27.
A novel voltammetric sensor was designed and used for the determination of l-tyrosine (l-Tyr) by surface modification of a glassy carbon electrode with reduced graphene oxide-hemin-Ag (rGO-H-Ag) nanocomposites. The nanocomposites were synthesized by a facile one-pot hydrothermal method and characterized by means of transmission electron microscopy and Raman spectroscopy. The determination of l-Tyr was investigated by cyclic voltammetry and further quantified using differential pulse voltammetry. The results revealed a significant enhanced electrochemical oxidation effect for l-Tyr at the nanocomposites modified electrode. Two linear ranges from 0.1 to 100 μM and 100 to 1000 μM as well as a low detection limit of 30 nM (S/N = 3) were obtained. In addition, the sensor also demonstrated good selectivity, reproducibility and stability.
设计了一种新型伏安传感器，通过用还原氧化石墨烯-血红素-银（rGO-H-Ag）纳米复合材料对玻碳电极进行表面修饰来测定L-酪氨酸（L-Tyr）。通过简便的一锅水热法合成了纳米复合材料，并通过透射电子显微镜和拉曼光谱对其进行了表征。采用循环伏安法研究了L-Tyr的测定，并使用差分脉冲伏安法进一步进行了定量分析。结果表明，在纳米复合材料修饰电极上，L-Tyr的电化学氧化效果显著增强。获得了0.1至100μM和100至1000μM的两个线性范围以及30 nM（S/N = 3）的低检测限。此外，该传感器还表现出良好的选择性、重现性和稳定性。
