摘要
以Nafion-多壁碳纳米管(MWNTs)薄膜修饰玻碳电极,采用恒电位法在其表面电沉积纳米Cu,研制了一种新型的芦丁电化学传感器。采用循环伏安法和电化学阻抗谱研究传感器在铁氰化钾-亚铁氰化钾体系中的电化学行为,以考察传感器的电化学性能,采用扫描电镜对传感器表面的形态进行了研究,并利用差分脉冲伏安法测定芦丁的含量。实验结果表明,该传感器对芦丁有较好的催化作用。在优化实验条件下,对芦丁检测的线性范围为1.0×10-8~1.0×10-6 mol/L,检出限为8.4×10-9 mol/L(S/N=3),回收率为98.1%~101%,该传感器制作简单,线性范围宽,灵敏度高,为槐米等样品中芦丁含量的检测提供了一种新的、行之有效的方法。
A rutin electrochemical sensor was developed by electrodepositing copper nanoparticles on a glassy carbon electrode modified with multi-walled carbon nanotubes(MWNTs)-Nafion.The electrochemical performance of the sensor was investigated by cyclic voltammetry and electrochemical impedance spectroscopy in potassium ferricyanide-potassium ferrocyanide system.The morphology of the sensor was studied by scanning electron microscopy,and differential pulse voltammetry was used for the detection of rutin.Results showed that the sensor had a good catalytic effect on rutin.Under the optimized conditions,the linear range of the sensor for rutin was from 1.0×10-8 mol/L to 1.0×10-6 mol/L,with a detection limit of 8.4×10-9 mol/L(S/N=3) and recoveries of 98.1%-101%.With the advantages of simple fabrication,wide linear range and high sensitivity,the sensor provided a new and effective method for the determination of rutin in Flos Sophorae Immaturus and other samples.
作者
李小蓉
郭惠
闫浩
李治
刘江涛
徐韵怡
LI Xiao-rong;GUO Hui;YAN Hao;LI Zhi;LIU Jiang-tao;XU Yun-yi(College of Pharmacy,Shaanxi University of Chinese Medicine,Xi an 712046,China)
出处
《分析测试学报》
CAS
CSCD
北大核心
2020年第3期377-382,388,共7页
Journal of Instrumental Analysis
基金
陕西省自然科学基础研究计划项目(2019JQ-874)
陕西中医药大学学科创新团队项目(2019-PY02)
陕西省教育厅项目(19JK0232)
陕西省高校科协青年人才托举计划项目(20170406)
陕西中医药大学自然科学培育基金(2016PY19)。
关键词
多壁碳纳米管
芦丁
纳米铜
NAFION
multi-walled carbon nanotubes
rutin
copper nanoparticles
Nafion
