期刊
FRONTIERS IN CHEMISTRY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2022.858107
关键词
zeolite imidazolate frameworks (ZIF-8); electrochemical aptasensors; mycotoxin; ochratoxin A (OTA); signal amplification strategy
资金
- National Key Research and Development Program [2017YFC1600604]
- National Natural Science Foundation of China [21575064]
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs
In this study, an electrochemical aptasensor was developed for OTA detection using AuNPs modified ZIFs ZIF-8 platform and DSN triggered HCR signal amplification. The aptasensor showed promising application prospects in accurate detection of OTA in real samples.
Ochratoxin A (OTA) is a harmful mycotoxin, which is mainly secreted by Penicillium and Aspergillus species. In this work, an electrochemical aptasensor is presented for OTA detection based on Au nanoparticles (AuNPs) modified zeolite imidazolate frameworks (ZIFs) ZIF-8 platform and duplex-specific nuclease (DSN) triggered hybridization chain reaction (HCR) signal amplification. G-quadruplex-hemin assembled HCR nanowire acted as a nicotinamide adenine dinucleotide (NADH) oxidase and an HRP-mimicking DNAzyme. Besides, thionine (Thi) was enriched as a redox probe for signal amplification in this pseudobienzyme electrocatalytic system. Under the optimal conditions, the analytical response ranged from 1 to 10(7) fg ml(-1) with a detection limit of 0.247 fg ml(-1). Furthermore, the aptasensor was proven to be applied in real wheat samples with a recovery between 96.8 and 104.2%, illustrating the potential prospects in practical detection.
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