Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 168, Issue 7, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac1494
Keywords
Molecularly imprinted sensor; poly (3-aminobenzoic acid); Vitamin B6; carbon fiber paper electrode
Funding
- DST-Nanomission, Govt of India [SR/NM/NT-1026/2017]
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A simple sensor for detecting Vitamin B-6 was developed in this study using an electropolymerized molecularly imprinted polymer. The sensor showed good performance and selectivity towards Vitamin B-6 detection based on the characterization of working electrodes.
Inadequate or excess consumption of Vitamin B-6 (Vit B-6) can have ill effects on the overall well-being of humans, thereby making it necessary to control their content and composition in the food we consume. A simple sensor is fabricated in this work for Vit B-6 detection based on employing an electropolymerized molecularly imprinted polymer (MIP) of 3-amino benzoic acid. The poly (3- aminobenzoic acid) (P-(3ABA)) film was electrodeposited by potentiodynamic cycling of potential with and without Vit B-6 (template) on carbon fiber paper electrode (CFP). The modified working electrodes were characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Field emission scanning microscopy, Energy dispersive X-ray spectrometry, Fourier Transform Infrared spectroscopy, Optical profilometry and X-ray photon electron spectroscopy were used for characterization. Nyquist plots revealed least charge transfer resistance at MIP/CFP than other control electrodes due to the molecularly imprinted sites. Under the optimized experimental conditions the developed MIP sensor showed a linear range 0.6 mu M to 700 mu M, with a detection limit of 0.010 mu M. Also a value of the imprinting factor (beta = 3.50) indicates very good selectivity of the prepared sensor towards Vit B6 detection over its structurally similar analogues in the analysis of real sample matrices.
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