Encapsulation of hemin in Fe-based metal-organic frameworks and its application for the direct determination of aflatoxin M1

被引：4
作者：
Jahangiri-Dehaghani, F. [1 ]
Zare, H. R. [1 ]
Shekari, Z. [1 ]
机构：
[1] Yazd Univ, Fac Sci, Dept Chem, Yazd 89195741, Iran
来源：
WORLD MYCOTOXIN JOURNAL | 2021年 / 14卷 / 02期
关键词：
label-free aptasensor; hemin; metal-organic frameworks; aflatoxin M-1; ELECTROCHEMICAL APTASENSOR; LABEL-FREE; GOLD NANOPARTICLES; M1; ELECTRODE; CARBON; COMPOSITES; NANOCOMPOSITE; SENSOR;
D O I：
10.3920/WMJ2020.2578
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
A label-free electrochemical aptasensor was constructed for the sensitive and selective determination of AFM(1). For preparation of the aptasensor, the AFM(1) aptamer was immobilised on the surface of a glassy carbon electrode modified with hemin encapsulated in Fe-based metal-organic frameworks (hemin@Fe-MIL-101). The morphology and the structure of Fe-MIL-101 and hemin@Fe-MIL-101 were evaluated by scanning electron microscopy, Fouriertransform infrared spectroscopy, X-ray powder diffraction and Brunauer-Emmett-Teller-N-2 sorption methods. Electrochemical impedance spectroscopy and cyclic voltammetry were performed to monitor the fabrication process of the electrochemical aptasensor. The electrochemical reduction current of hemin encapsulated in Fe-MIL-101 serves as a signal for the quantitative determination of AFM(1). Differential pulse voltammetry was done to determine the AFM(1) concentration in the linear range of 1.0x10(-1)-100.0 ng/ml. The detection limit of AFM(1) was estimated to be 4.6x10(-2) ng/ml. Finally, the fabricated aptasensor was applied to determine AFM(1) in raw and boiled milk samples.
引用
收藏
页码：111 / 120
页数：10
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