ZnO nanoparticle-modified ionic liquid-carbon paste electrodefor voltammetric determination of folic acid in food and pharmaceutical samples

被引：0
作者：
Ali Taherkhani
Tahoora Jamali
Hassan Hadadzadeh
Hassan Karimi-Maleh
Hadi Beitollahi
Mehdi Taghavi
Fatemeh Karimi
机构：
[1] Islamic Azad University,Department of Physics, Takestan Branch
[2] Islamic Azad University,Department of Food Science, Science and Research Branch
[3] Isfahan University of Technology,Department of Chemistry
[4] Graduate University of Advanced Technology,Department of Chemistry
[5] Graduate University of Advanced Technology,Environment Department, Institute of Science and High Technology and Environmental Sciences
[6] University of Mazandaran,Polymer Chemistry Research Laboratory, Department of Chemistry
[7] Islamic Azad University,Department of Chemistry, Science and Research Branch
来源：
Ionics | 2014年 / 20卷
关键词：
ZnO nanoparticle; Folic acid; Ionic liquid; Modified electrode;
D O I：
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中图分类号：
学科分类号：
摘要：
In this work, a ZnO/nanoparticles (NPs) modified carbon ionic liquid paste electrode (ZnO/NP/CILPE) was fabricated and used to investigate the electrochemical behavior of folic acid. ZnO/NP/CILPE was prepared by mixing hydrophilic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim]-[PF6])), ZnO/NPs, graphite powder, and liquid paraffin together. The fabricated ZnO/NP/CILPE showed great electrocatalytic ability to the oxidation of folic acid, and an irreversible oxidation peak appeared at 0.75 V (vs. Ag/AgCl) with improved peak current. Under the optimized conditions of pH 9.0, the plot of peak current vs. folic acid concentration consisted of two linear segments with slopes of 1.776and 0.033 μA/μM in the concentration ranges of 0.05–1.5 μM and 1.5–550.0 μM, respectively. The detection limit was 0.01 μM (3σ). The proposed sensor was successfully applied for the determination of folic acid in fortified food and pharmaceutical samples.
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页码：421 / 429
页数：8
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