Mechanistic Insights into the Voltammetric Determination of Riboflavin at Poly (Serine) Modified Graphite and Carbon Nanotube Composite Paste Electrode

Abstract

Intense present work is directed on the fabrication and application of Poly (serine) modified graphite carbon nanotube composite paste electrode (PSR/CNTPE) for determining the Riboflavin (RF). The surface qualities of the projected sensor were observed by Field Emission Scanning Electron Microscopy (FE-SEM) and the conductivity by Electrochemical Impedance Spectroscopy (EIS) method. The electrochemical redox activity of the PSR/CNTPE to RF was investigated through Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV). Outcomes displays that Poly (serine) in CNTPE enhanced the catalytic performance of the electrode towards the redox reaction of RF. The voltammetric response of PSR/CNTPE exhibited linear dependence for extended concentration range of RF from 6 μM to 50 μM with lower detection limit of 3.4 × 10 À 8 M.The PSR/CNTPE revealed to be reproducible, highly stable and successfully validated for the pharmaceutical, beverage and milk samples. The fabricated electrode was conducive and displayed two well-separated oxidation signals for the solution containing two vitamins RF and Folic Acid (FA). The projected sensor is an adequate candidate for electrochemical sensing of RF.

Electrochemical Determination of Riboflavin using a Poly(Titan Yellow) Modified Carbon Nanotube Paste Electrode in the Presence of Dopamine

“…The attained values of LOD and LOQ are found to be 2.679×10 −8 M and 8.932×10 −8 M, correspondingly. The proposed PTYMCNTPE surface validates a lower or nearer LOD than reported RF sensors and the comparison was shown in Table 1 [3,20, 23, 33–39] …”

“…The proposed PTYMCNTPE surface validates a lower or nearer LOD than reported RF sensors and the comparison was shown in Table 1. [3,20,23,[33][34][35][36][37][38][39] Simultaneous determination of RF and DA on BCNTPE and PTYMCNTPE Simultaneous analysis of 1.0 mM RF in the incidence of 1.0 mM DA was documented by the DPV method on BCNTPE (curve a) and PTYMCNTPE (curve b) in 0.2 M PBS of pH 6.5 at the potential window of À 0.9 to 0.5 V and the voltammetric spectra is shown in Figure 8. The PTYMCNTPE discloses a responsive and characteristic electro-oxidation peak for RF and DA at the potentials of À 0.511 V and 0.092 V, consistently.…”

Highly Selective and Sensitive Voltammetric Method for the Detection of Catechol in Tea and Water Samples Using Poly(gibberellic acid)-Modified Carbon Paste Electrode

“…This sensing material can be improvized, focusing on the significant catalytic behavior, high conductivity, wider surface area as well as the sensitivity of the target analyte, by enhancing the oxidation peak current and lowering the oxidation potential. 17 Electropolymerization is a facile technique for the fabrication of surface-modified CPEs. Gibberellic acid is a water-soluble phytohormone, and there is no literature survey about its modification on the electrode, except one.…”

“…This is certainly due to the aspects of effortless preparation, biocompatibility, rapid surface regeneration, and easy modification with low Ohmic resistance. This sensing material can be improvized, focusing on the significant catalytic behavior, high conductivity, wider surface area as well as the sensitivity of the target analyte, by enhancing the oxidation peak current and lowering the oxidation potential . Electropolymerization is a facile technique for the fabrication of surface-modified CPEs.…”

Sensores y biosensores electroquímicos: nuevos horizontes y desafíos en su integración en sistemas multisensores para su aplicación en la industria alimentaria

“…respuestas fiables en tiempos breves [201]. Por otra parte, existen investigaciones que se centran en el desarrollo de otros tipos de sensores para la detección de vitaminas [202],…”