期刊
FOOD CHEMISTRY
卷 367, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130727
关键词
Amaranth; Electrochemical sensor; Functional graphene oxide; Nanoporous gold (NPG)
资金
- National Key R&D Program of China [2018YFC1603400]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
An electrochemical sensor was developed by modifying a nanoporous gold-coated glassy carbon electrode with functionalized graphene oxide/chitosan/ionic liquid nanocomposites. The sensor showed excellent analytical performance for detecting Amaranth, with high sensitivity and selectivity, reproducibility, and long-time stability. Practical application in detecting Amaranth in different drinks showed satisfactory results.
An electrochemical sensor was fabricated by modifying nanoporous gold (NPG)-coated glassy carbon electrode (NPG/GCE) with functionalized graphene oxide /chitosan/ionic liquid nanocomposites (fGO/CS/IL). The introduction of ionic liquid (IL) and chitosan (CS) induced higher dispersibility of functionalized graphene oxide (fGO), and was beneficial for the combination of fGO/CS/IL with NPG/GCE. As a result of the synergistic effect of NPG and fGO/CS/IL, the resulted functionalized graphene oxide/chitosan/ionic liquid nanocomposites/nanoporous gold /glassy carbon electrode (fGO/CS/IL/NPG/GCE) showed the highest redox peak current response signal of Amaranth (E123) due to ultrahigh surface area, electronic conductivity as well as the improvement of the surface structure. Under optimized conditions, the enhanced peak currents represented excellent analytical performance for detection of Amaranth in the concentration range from 8.0 to 1200.0 nM. Meanwhile, the fGO/ CS/IL/NPG/GCE presented satisfactory sensitivity and selectivity, excellent reproducibility, and long-time stability. For practical applications, the fGO/CS/IL/NPG/GCE was validated for the determination of Amaranth in three types of drinks with satisfactory results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据