Graphene quantum dot modified screen printed immunosensor for the determination of parathion

The widespread use of pesticides has immense effect on increased crop productions. However, they are also responsible for posing detrimental health hazards and/or for contaminating the environment with chemical residues. A routine and an on-field detection of pesticide residues in different food, wa...

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Published inAnalytical biochemistry Vol. 523; pp. 1 - 9
Main Authors Mehta, Jyotsana, Bhardwaj, Neha, Bhardwaj, Sanjeev K., Tuteja, Satish K., Vinayak, Priya, Paul, A.K., Kim, Ki-Hyun, Deep, Akash
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 15.04.2017
Subjects
Antibodies, Immobilized - chemistry
Biosensing Techniques
Electrochemical impedance spectroscopy
Electrochemical Techniques - methods
Graphene quantum dots
Graphite - chemistry
Humans
Immunosensor
Insecticides - analysis
Limit of Detection
Parathion
Parathion - analysis
Printing - instrumentation
Printing - methods
Quantum Dots
Screen-printed electrode
Parathion
Screen-printed electrode
Immunosensor
Graphene quantum dots
Electrochemical impedance spectroscopy
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Summary:The widespread use of pesticides has immense effect on increased crop productions. However, they are also responsible for posing detrimental health hazards and/or for contaminating the environment with chemical residues. A routine and an on-field detection of pesticide residues in different food, water, and soil samples has become a need of the hour for which biosensors can offer a viable alternative. The present work reports a functionalized graphene quantum dot (GQD) based screen printed electrochemical immunosensor for the detection of parathion. The application of GQDs has permitted the realization of a sensitive, robust, and reproducible sensor unlike those carried out earlier for the similar purposes. This immunosensor exhibited a dynamic linear response for parathion within the range of 0.01–106 ng/L with a very low detection limit of 46 pg/L. According to the analysis of potential interferences, the proposed sensor was specifically detecting parathion even in the presence of its metabolite, paraoxon. The investigations of the proposed sensing approach with respect to stability, response reproducibility, and regeneration have fully supported its potential practical applicability.
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ISSN:0003-2697
1096-0309
DOI:10.1016/j.ab.2017.01.026