scholarly journals Sensitive colorimetric detection of ochratoxin A by a dual-functional Au/Fe3O4 nanohybrid-based aptasensor

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38590-38596
Author(s):  
Rong Huang ◽  
Lu Lu Xiong ◽  
Hui Hui Chai ◽  
Jing Jing Fu ◽  
Zhisong Lu ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Colorimetric Detection ◽  
Dual Functional ◽  
Colorimetric Aptasensor

A novel colorimetric aptasensor based on a Au/Fe3O4 nanohybrid was developed to detect ochratoxin A (OTA).

Disassembly of gold nanoparticle dimers for colorimetric detection of ochratoxin A

2015 ◽  
Vol 7 (3) ◽  
pp. 842-845 ◽  
Author(s):  
Rongping Xiao ◽  
Daifang Wang ◽  
Zhenyu Lin ◽  
Bin Qiu ◽  
Meihua Liu ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Ochratoxin A ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Colorimetric Aptasensor

We demonstrate the first colorimetric aptasensor for sensitive detection of ochratoxin A based on disassembly of aggregates of oriented AuNP dimers.

scholarly journals Molecular Diagnostic of Ochratoxin A with Specific Aptamers in Corn and Groundnut via Fabrication of A Microfluidic Device

2021 ◽  
Author(s):  
Deepshikha Shahdeo ◽  
Azmat Ali Khan ◽  
Amer M Alanazi ◽  
Yun Suk Huh ◽  
Shruti Shukla ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Limit Of Detection ◽  
Colorimetric Assay ◽  
Animal Health ◽  
Colorimetric Detection ◽  
Molecular Diagnostic ◽  
Detection Range ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Analytical Device

Abstract Ochratoxin A (OTA) is one of the predominant mycotoxins that contaminate a wide range of food commodities. In the present study, a 36-mer aptamer was used as a molecular recognition element coupled with gold nanoparticles (AuNPs) for colorimetric detection of OTA in a microfluidic paper-based analytical device (µPADs). The µPADs consisted of three zones: control, detection, and sample, interconnected by channels. The biophysical characterizations of aptamer conjugated AuNPs were done by UV-vis spectroscopy (UV-vis), dynamic Light Scattering (DLS), and transmission electron microscopy (TEM). The developed colorimetric assay for OTA showed a limit of detection of 242, 545, and 95.69 ng/mL in water, corn, and groundnut, respectively. The HPLC detection method achieved acceptable coefficient in standard curves (r2 = 0.9995), better detection range, and recovery rates in spiked corn and groundnut samples as 43.61 ± 2.18% to 87.10 ± 1.82% and 42.01 ± 1.31% to 86.03 ± 2.64% after multiple sample extractions and cleanup steps. However, the developed µPADs analytical device had the potent ability to rapidly detect OTA without any extraction pre-requirement, derivatization, and cleanup steps, thus illustrating its feasibility in the animal health sector, agricultural, and food industries.

A nanozyme-based cascade colorimetric aptasensor for amplified detection of ochratoxin A

Nanoscale ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 9547-9555 ◽  
Author(s):  
Fengyu Tian ◽  
Jing Zhou ◽  
Bining Jiao ◽  
Yue He
Keyword(s):  
Alkaline Phosphatase ◽  
Ochratoxin A ◽  
Catalytic Reaction ◽  
Structure Switching ◽  
Colorimetric Aptasensor

A sensitive colorimetric aptasensor has been developed based on structure-switching of an OTA aptamer coupled with an alkaline phosphatase-MnO2 cascade catalytic reaction.

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

2016 ◽  
Vol 236 ◽  
pp. 719-731 ◽  
Author(s):  
Nayan Roy ◽  
Abhijit Dutta ◽  
Paritosh Mondal ◽  
Pradip C. Paul ◽  
T. Sanjoy Singh
Keyword(s):  
Colorimetric Detection ◽  
Turn On ◽  
Dual Functional ◽  
Fluorescence Turn On

Highly sensitive colorimetric aptasensor for ochratoxin A detection based on enzyme-encapsulated liposome

2018 ◽  
Vol 1002 ◽  
pp. 90-96 ◽  
Author(s):  
Cuiying Lin ◽  
Huixia Zheng ◽  
Mi Sun ◽  
Yajuan Guo ◽  
Fang Luo ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Highly Sensitive ◽  
Colorimetric Aptasensor

Synthesis of dual-functional Ag/Au nanoparticles based on the decreased cavitating rate under alkaline conditions and the colorimetric detection of mercury(ii) and lead(ii)

2018 ◽  
Vol 6 (28) ◽  
pp. 7557-7567 ◽  
Author(s):  
Ting-Yang Xing ◽  
Jing Zhao ◽  
Guo-Jun Weng ◽  
Jian-Jun Li ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Colorimetric Detection ◽  
Core Shell ◽  
Specific Detection ◽  
Shell Nanoparticles ◽  
Dual Functional ◽  
Alkaline Conditions ◽  
Core Shell Nanoparticles

Synthesis of Ag/Au core–shell nanoparticles with two LSPR modes and the specific detection of Hg2+and Pb2+.

scholarly journals Colorimetric detection of streptomycin in milk based on peroxidase-mimicking catalytic activity of gold nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (61) ◽  
pp. 38471-38478 ◽  
Author(s):  
Jing Zhao ◽  
Yuangen Wu ◽  
Han Tao ◽  
Huayun Chen ◽  
Wenping Yang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Colorimetric Detection ◽  
Colorimetric Aptasensor

A novel and effective colorimetric aptasensor based on enhanced peroxidase-mimicking catalytic ability of AuNPs was proposed for streptomycin detection.

Ultrasensitive and selective colorimetric detection of acetamiprid pesticide based on the enhanced peroxidase-like activity of gold nanoparticles

2017 ◽  
Vol 9 (37) ◽  
pp. 5484-5493 ◽  
Author(s):  
Wenping Yang ◽  
Yuangen Wu ◽  
Han Tao ◽  
Jing Zhao ◽  
Huayun Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Peroxidase Activity ◽  
Colorimetric Detection ◽  
Ultrasensitive Detection ◽  
Colorimetric Aptasensor

A colorimetric aptasensor based on the peroxidase activity of AuNPs has been proposed for the rapid and ultrasensitive detection of acetamiprid.

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