Electrochemical Sensor for Dapsone Using Molecularly Imprinted Polypyrrole Membrane as a Recognition Element

2015 ◽  
Vol 162 (6) ◽  
pp. B109-B113 ◽  
Author(s):  
Abbas Afkhami ◽  
Fatemeh Gomar ◽  
Tayyebeh Madrakian
Keyword(s):  
Electrochemical Sensor ◽  
Molecularly Imprinted ◽  
Recognition Element

Electrochemical Sensor for Catechol and Dopamine Based on a Catalytic Molecularly Imprinted Polymer-Conducting Polymer Hybrid Recognition Element

2009 ◽  
Vol 81 (9) ◽  
pp. 3576-3584 ◽  
Author(s):  
Dhana Lakshmi ◽  
Alessandra Bossi ◽  
Michael J. Whitcombe ◽  
Iva Chianella ◽  
Steven A. Fowler ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Conducting Polymer ◽  
Molecularly Imprinted Polymer ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Recognition Element ◽  
Polymer Hybrid

A Sensitive and Selective Electrochemical Sensor for Sulfadimethoxine Based on Electropolymerized Molecularly Imprinted Poly (o-aminophenol) Film

2020 ◽  
Vol 16 (4) ◽  
pp. 413-420 ◽  
Author(s):  
Youyuan Peng ◽  
Qiaolan Ji
Keyword(s):  
Electrochemical Sensor ◽  
Polymer Film ◽  
Water Samples ◽  
Differential Pulse ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Long Term Stability ◽  
Multi Walled Carbon Nanotubes ◽  
Aquaculture Water ◽  
Walled Carbon Nanotubes

Background: As a broad-spectrum antibiotic of the sulfonamide family, Sulfadimethoxine (SDM) has been widely utilized for therapeutic and growth-promoting purposes in animals. However, the use of SDM can cause residual problems. Even a low concentration of SDM in the aquatic system can exert toxic effects on target organisms and green algae. Therefore, the quantitation of SDM residues has become an important task. Methods: The present work describes the development of a sensitive and selective electrochemical sensor for sulfadimethoxine based on molecularly imprinted poly(o-aminophenol) film. The molecular imprinted polymer film was fabricated by electropolymerizing o-aminophenol in the presence of SDM after depositing carboxylfunctionalized multi-walled carbon nanotubes onto a glassy carbon electrode surface. SDM can be quickly removed by electrochemical methods. The imprinted polymer film was characterized by cyclic voltammetry, differential pulse voltammetry and scanning electron microscopy. Results: Under the selected optimal conditions, the molecularly imprinted sensor shows a linear range from 1.0 × 10-7 to 2.0 × 10-5 mol L-1 for SDM, with a detection limit of 4.0 × 10-8 mol L-1. The sensor was applied to the determination of SDM in aquaculture water samples successfully, with the recoveries ranging from 95% to 106%. Conclusion: The proposed sensor exhibited a high degree of selectivity for SDM in comparison to other structurally similar molecules, along with long-term stability, good reproducibility and excellent regeneration capacity. The sensor may offer a feasible strategy for the analysis of SDM in aquaculture water samples.

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