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A label-free electrochemical immunosensor based on AuNPs/Zn/Ni-ZIF-8-800@graphene for the detection of wheat gliadin

文献类型： 外文期刊

作者： Zhan, Ke 1 ; Du, Yongkun 2 ; Liu, Qingqing 1 ; Cui, Chenxu 1 ; Xing, Guangxu 4 ; Li, Shanshan 2 ; Ren, Hongtao 1 ; Wang, Fan 1 ; Xu, Chao 1 ; Wang, Na 1 ;

作者机构： 1.Henan Agr Univ, Coll Food Sci & Technol, Zhengzhou 450002, Henan, Peoples R China

2.Coll Vet Med Int Joint Res Ctr Anim Immunol, Zhengzhou 450046, Henan, Peoples R China

3.Longhu Lab Adv Immunol, Zhengzhou 450046, Peoples R China

4.Henan Acad Agr Sci, Key Lab Anim Immunol, Minist Agr, Zhengzhou 450002, Henan, Peoples R China

5.Key Lab Nutr & Hlth Food Zhengzhou, Zhengzhou 450002, Henan, Peoples R China

关键词： Wheat gliadin; Celiac disease; Electrochemical immunosensor; AuNPs/Zn/Ni-ZIF-8-800@graphene; Monoclonal antibody; Food allergies

期刊名称：JOURNAL OF APPLIED ELECTROCHEMISTRY （ 影响因子：2.9； 五年影响因子：2.8 ）

ISSN： 0021-891X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Wheat gliadin is thought to be the main cause of wheat allergy leading to celiac disease. In this study, we reported an electrochemical immunosensor based on AuNPs/Zn/Ni-ZIF-8-800@graphene for simple, efficient, and sensitive detection of gliadin. A monoclonal antibody against gliadin were prepared by hybridoma technique. Zn/Ni-ZIF-8-800 with high stability was prepared by using zinc-nickel bimetallic organic framework MOFs, and graphene and gold nanoparticles with large surface area and excellent conductivity were introduced. Chitosan was used as a binder to fixed the composite on the surface of glassy carbon electrode. The fabricated materials and the corresponding sensors were comprehensively characterized by X-ray diffractometer, scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, and cyclic voltammetry analyses. Under the optimal conditions, the linear range of the electrochemical immunosensor was 0.1-100 mu g mL-1, and the detection limit was 0.950 mu g mL-1. In addition, the fabricated sensor exhibited high selectivity and long-term stability. The recovery test showed that the prepared sensor was suitable for the detection of gliadin in real food and feed, exhibiting great promising of the developed sensor in practical application.

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