Electropolymerized Congo Red Film based Sensor for Dopamine: A Voltammetric Study

Abstract

The polymerization film of Congo red was prepared on the surface of carbon paste electrode by electropolymerization using cyclic voltammetric method. The higher catalytic activity was obtained for electrocatalytic oxidation of Dopamine, with drastic enhancement of the reversibility and peak current in 0.2 phosphate buffer solution of pH 7.0 at the sweep rate 100 mV/s. The variation of sweep rate and pH were investigated. The limit of detection of Dopamine was found to be 0.06 µM. The effect of interference studies was done by differential pulse voltammetric technique. In the simultaneous look at, Dopamine and Uric acid were well separated by cyclic voltammetric technique. The proposed method showed good sensitivity, selectivity, and reproducibility.

Microbial fuel cell (MFC) performance with pigments bikaverin and congo red as electrochemical mediators for optmization power energy

“…Despite the high centralization of the peaks, and presenting a redox pair, Congo red shows this behavior, when analyzed with a greater range of applied potential. (Kuskur, C. M., et al 2017). With a lower energy effort, as applied to bikaverin (-0.1 to 1.0V), Congo red does not show a well-defined reductive curve, only an oxidation one (Shetti, et al 2019).…”

Electrochemical sensing of dobutamine, paracetamol, amlodipine, and daclatasvir in serum based on thiourea SAMs over nano-gold particles–CNTs composite

“…The latter situation leads to the presence of extra toxic metabolites causing harmful effects in the human body namely liver disorder, damage of kidneys, pancreas inflammation, and dizziness. [38][39][40][41][42] Different methods were used for the determination of PA such as high-performance thin layer chromatography (HPTLC), 43 and ultra-high-performance liquid chromatographydiode array detector-tandem mass spectrometry (UPLC/DAD). 44 These methods show some drawbacks including high cost of equipment and operation, complicated and time-consuming assays, a high detection limit and low sensitivity.…”

A nano-sensor based on screen printed electrode (SPE) for electro-chemical detection of vitamin B9

“…Food folates such as polyglutamates and mono-glutamates (parent compound) are transformed into stomach to dihydrofolate (DHF) and tetrahydrofolate (THF) and afterwards is converted into 5methyl tetrahydrofolate using enzyme 5, 10 methyl-enetetrahydrofolate reductase (MTHFR). The active form of folic acid in plasma is 5-methyl THF [2,3]. This substance contributes to reactions of the single carbon transfer in metabolism, and is the precursor of active tetrahydro folic acid co-enzyme.…”