Journal
FOOD CHEMISTRY
Volume 292, Issue -, Pages 98-105Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.04.050
Keywords
Aptasensor; Monitoring; Nitrogen doped graphene quantum dots; Self-enhanced electrochemiluminescence; Zearalenone
Funding
- National Natural Science Foundation of China [21675065, 61801195]
- Six Categories Talent Peak of Jiangsu Province [NY-011]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions [2014-37]
- Graduate Research Innovation Projects of Jiangsu Province [KYCX18_2264]
- 333 Project [BRA2017390]
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Accurate and early diagnosis of mycotoxin is particularly significant to the food and agricultural product safety. In the present work, a sensitive and effective monitoring method for zearalenone (ZEN) was exploited based on a novel self-enhanced electrochemiluminescence (ECL) aptasensor. The self-enhanced lumonophore was compounded by electrostatically combining amine-functionalized Ru(bpy)(3)(2+) -doped silica nanoparticles (NH2-Ru@SiO2 NPs) and nitrogen doped graphene quantum dots (NGQDs) together. Since the emitter and co-reactant simultaneously existed in the same nanoparticle, shortened electron-transfer distance and decreased energy loss was obtained. Therefore, self-enhanced ECL aptasensor based on the novel complex expressed the widest linear range of 10 fg mL(-1)-10 ng mL(-1) and the lowest detection limit of 1 fg mL(-1) for ZEN detection. More importantly, ZEN produced during the mildew process of corn flour was monitored by the developed aptasensor, which exhibited superior determination and potential application in real samples.
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