The food safety testing research group led by Professor Wu Yuangen from the School of Winemaking and Food Engineering of Guizhou University recently used the peroxidase mimic enzyme activity of porous cobalt tetroxide nanosheets to prepare a new type of ratio for the rapid detection of glyphosate pesticide residues. The results of the colored nano-enzyme tablets were published in the Journal of Agricultural and Food Chemistry (JAFC) on March 16, 2021. This is the second time the research group has published a research paper on JAFC this month. JAFC is published by the American Chemical Society (ACS). It is an international authoritative journal in the field of food science and agriculture and forestry sciences. The latest impact factor is 4.192 (2019). It is listed as zone 1 in the basic and upgraded versions of the Chinese Academy of Sciences.
Article online publication link URL:https://pubs.acs.org/doi/10.1021/acs.jafc.0c08208
The design of colorimetric nanoenzyme tablets and the schematic diagram of glyphosate detection
Compared with protein-based natural enzymes, nano-enzymes are chemically inorganic or metallic in nature, and have many advantages such as simple preparation, low cost, and stable catalytic performance. The colorimetric nanoenzyme tablet has high detection efficiency, good detection sensitivity and stability, and is expected to be used for rapid screening of glyphosate pesticide residues in agricultural products.
(A) SEM image of porous Co3O4 nanosheets; (B) Colorimetric nanoenzyme sheet for detection of glyphosate pesticides Feasibility; (C) TEM image of porous Co3O4 nanosheets; (D) detection sensitivity of colorimetric nanoenzyme tablets for glyphosate; (E) detection specificity of colorimetric nanoenzyme tablets for glyphosate.
Introduction to the first author:
Luo Danqiu, female, master of agriculture, graduated from Guizhou University College of Brewing and Food Engineering in September 2020, majoring in food processing and safety. In the early stage, the student used oligonucleotides and pesticides to regulate the peroxidase activity of hemin, and established a new method for colorimetric detection of hydrocarbophos pesticides. The related results were published in the international analytical journal Analytical as the first author. and Bioanalytical Chemistry (Class 2 of the Chinese Academy of Sciences). This student has successively won awards and honorary titles such as Guizhou University Graduate Summer Practice Advanced Individual, Guizhou University Postgraduate Special Scholarship, and Guizhou University Innovation Award.
Introduction to the corresponding author:
Wu Yuangen, male, Ph.D., professor, received his Ph.D. from Shanghai Jiaotong University in 2014 and was selected as a high-level innovative talent program in Guizhou Province, Guizhou University”Young Talents” In the past five years, he has won the first “Guohua Award” of Guizhou University, the first prize of Guizhou University’s “Excellence Award”, and the third prize of Guizhou University’s first young teacher teaching competition. He presided over and completed 3 national natural sciences. Funds, 2 key projects of the Guizhou Province Science and Technology Fund, 1 Guizhou Province Science and Technology Support Program, etc., in the Journal of Agricultural and Food Chemistry, Chemical Communications, Journal of Colloid and Interface Science, Nanoscale, Sensors and Actuators B:Chemical, Analytica Chimica Nearly 40 SCI papers have been published in well-known journals such as Acta, and signed papers have been cited by SCI more than 1,000 times. The current research interest of the subject is to use Capture-SELEX technology to screen the nucleic acid recognition ligands of food small molecule hazards, and use precious metals, inorganic nanomaterials, organic small molecules, etc. as signal carriers to establish aptamer recognition and nanoenzyme catalysis. New methods of food safety inspection and quick inspection of products.