Facile Colorimetric Nanozyme Sheet for the Rapid Detection of Glyphosate in Agricultural Products Based on Inhibiting Peroxidase-Like Catalytic Activity of Porous Co3O4 Nanoplates

2021 ◽  
Author(s):  
Danqiu Luo ◽  
Xiaohuan Huang ◽  
Bangyan Liu ◽  
Wenying Zou ◽  
Yuangen Wu
Keyword(s):  
Catalytic Activity ◽  
Rapid Detection ◽  
Agricultural Products

A simple and rapid chemosensor for colorimetric detection of dimethoate pesticide based on the peroxidase-mimicking catalytic activity of gold nanoparticles

2019 ◽  
Vol 11 (41) ◽  
pp. 5337-5347 ◽  
Author(s):  
Yang Hu ◽  
Jinlong Wang ◽  
Yuangen Wu
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Rapid Detection ◽  
Colorimetric Detection ◽  
Agricultural Products

A novel chemosensor based on the inhibition of the peroxidase-like activity of AuNPs has been proposed for the simple and rapid detection of dimethoate pesticide in agricultural products.

scholarly journals Co3O4/PAn Magnetic Nanoparticle-Modified Electrochemical Immunosensor for Azocyclotin

2021 ◽  
Author(s):  
Weihua Wang ◽  
Zhanjiang Han ◽  
Qian Xi ◽  
Dongla Gao ◽  
Ruicheng Guo ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Competitive Inhibition ◽  
Detection System ◽  
Reaction System ◽  
Test System ◽  
Electrochemical Immunosensor ◽  
Agricultural Products ◽  
System A ◽  
Electrolytic Current ◽  
Antigen Antibody

AbstractIn the current study, for rapid detection of azocylotin residues in agricultural products, the Co3O4/PAn nanoparticles modified electrochemical immunosensor was generated successfully. Azocylotin-BSA artificial antigen coupling to the surface of the working electrode coated with the Co3O4/PAn nanoparticles thin-layer, the competitive inhibition reaction is launched between the azocylotin in the samples and the azocylotin coupled on the electrode with the azocylotin monoclonal antibodies in the test system. The antigen-antibody reaction signal conductive amplified by the coupled silver nanoparticles, and then the electrolytic current in the reaction system was detected. After establishing basic detection system, a series of optimization including the concentration of immobilized membrane optimization, electrode surface coated material composition optimization, selection of buffer, coupling antigen concentration optimization and anti-antibody label optimization will be done. Subsequently, the concentrations of azocylotin in samples of standards, orange and apple were tested, and the results indicated that this immune sensor has good sensitivity and high accuracy. The research could provide the reference for the research, development and application of sensors to realize rapid detection of pesticide residues in agricultural products.

scholarly journals The Effect of Synthesis Procedure on Hydrogen Peroxidase-Like Catalytic Activity of Iron Oxide Magnetic Particles

2020 ◽  
Vol 10 (19) ◽  
pp. 6756
Author(s):  
Atripan Mukherjee ◽  
Amir M. Ashrafi ◽  
Pavel Svec ◽  
Lukáš Richtera ◽  
Jan Přibyl ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rapid Detection ◽  
Magnetic Particles ◽  
Limit Of Detection ◽  
Cathodic Potential ◽  
Limit Of Quantification ◽  
Figures Of Merit ◽  
Satisfactory Analysis ◽  
Synthesis Procedure

A comparative study was carried out using magnetic nanoparticles (MNPs) for the fabrication of non-enzymatic sensors for the continuous and rapid detection and monitoring of H2O2. Various MNPs, differing in terms of their synthesis procedure and modification, were synthesized and characterized by different techniques. The electrochemical catalytic activity of the synthesized MNPs toward the reduction in H2O2 was investigated by cyclic voltammetry. The naked MNPs showed the highest catalytic activity among all the synthesized MNPs. The biosensor based on the naked MNPs was then applied in the determination of H2O2 using chronoamperometry. The parameters such as the applied cathodic potential and the amount of MNPs on the developed biosensor were optimized. Moreover, the analytical figures of merit, including reproducibility (RSD = 6.14%), sensitivity (m = 0.0676 µA µM−1), limit of detection (LOD) = 27.02 µmol L−1, and limit of quantification (LOQ) = 89.26 µmol L−1 of the developed biosensor indicate satisfactory analysis. Finally, MNPs were successfully utilized for the determination of H2O2 in milk.

scholarly journals Waveguide-Based Fluorescent Immunosensor for the Simultaneous Detection of Carbofuran and 3-Hydroxy-Carbofuran

Biosensors ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 191
Author(s):  
Weiming Sun ◽  
Lanhua Liu ◽  
Abdul Ghaffar Memon ◽  
Xiaohong Zhou ◽  
Hongwei Zhao
Keyword(s):  
Water Quality ◽  
Monoclonal Antibody ◽  
Human Health ◽  
Broad Spectrum ◽  
Rapid Detection ◽  
Detection Method ◽  
Simultaneous Detection ◽  
Agricultural Products ◽  
Linear Detection ◽  
High Binding Affinity

Carbofuran (CBF) is an efficient and broad-spectrum insecticide. As testing indicators for water quality and agricultural products, CBF and its metabolite 3-hydroxy-carbofuran (3-OH-CBF) are regulated by many countries. The detection of CBF and 3-OH-CBF is of great importance for the environment and human health. However, an immunosensor detection method for the simultaneous analysis of CBF and 3-OH-CBF remains unavailable. Herein, we report a waveguide-based fluorescent immunosensor for detecting CBF and 3-OH-CBF, synchronously. The immunosensor is based on a broad-spectrum monoclonal antibody with high binding affinity against CBF and 3-OH-CBF. The linear detection ranges for CBF and 3-OH-CBF are 0.29–2.69 and 0.12–4.59 μg/L, with limits of detection of 0.13 μg/L for CBF and 0.06 μg/L for 3-OH-CBF, respectively. The whole detection process for each cycle is approximately 30 min. The results show a good application prospect for the rapid detection of CBF and 3-OH-CBF in water or agricultural products.

A highly specific and sensitive fluorescence polarization immunoassay for the rapid detection of triazophos residue in agricultural products

2016 ◽  
Vol 8 (36) ◽  
pp. 6636-6644 ◽  
Author(s):  
Ying Liu ◽  
Rui Liu ◽  
Anna Boroduleva ◽  
Sergei Eremin ◽  
Yirong Guo ◽  
...  
Keyword(s):  
Fluorescence Polarization ◽  
Rapid Detection ◽  
Agricultural Products ◽  
Fluorescence Polarization Immunoassay

A highly specific and sensitive fluorescence polarization immunoassay for the rapid detection of triazophos.

Tube-Immunoassay for Rapid Detection of Carbaryl Residues in Agricultural Products

2006 ◽  
Vol 41 (5) ◽  
pp. 693-704 ◽  
Author(s):  
SHUO WANG ◽  
CHUNDI YU ◽  
YAN ZHANG ◽  
JUNPING WANG ◽  
ZHENJUAN DUAN ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Agricultural Products

Ag dendritic nanostructures for rapid detection of thiram based on surface-enhanced Raman scattering

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70553-70557 ◽  
Author(s):  
Qiang Wang ◽  
Dun Wu ◽  
Zhidong Chen
Keyword(s):  
Rapid Detection ◽  
Agricultural Products ◽  
Raman Signal ◽  
Surface Enhanced ◽  
Dendritic Nanostructures ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate ◽  
Signal Readout

We have developed a SERS-active substrate based on Ag dendritic nanostructures for sensitive Raman signal readout and fingerprint identification of pesticide residues in agricultural products and environments.

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