Electrochemical Sensing Platform Based on The Modified Carbon-Ceramic Electrode Using Multiwalled Carbon Nanotubes (MWCNTs) Through The Sol-Gel Process: Application in Sensitive Determination of Morin as A Common Flavonoids

Abstract

Morin is one of the most common flavonoids which found in nature, plants and vegetable-derived foods and Brazilian yellow tree is a source for its extraction. Because of hydroxyl group existence, Morin represents better antioxidant properties and have great significance in bio electrochemistry-based investigations. In this research work, an electrochemical-based sensing platform was designed based on a modified carbon-ceramic electrode (CCE) through a sol-gel process with carbon nanotubes for the investigation of the electrochemical behavior of Morin. Various electrochemical techniques have been used for the analytical investigation of the proposed sensing platform including cyclic voltammetry (CV), differential pulse voltammetry (DPV), and anodic stripping voltammetry (ASV) methods. Furthermore, the morphological investigation was efficiently performed for the demonstration of electrode surface characteristics. The obtained results showed that the anodic peak currents increased linearly in a concentration range of 0.7– 3 µM, where detection limit is equal to 0.27 µM for DPV, and the linear range is considered to be 0.6-4 µM where there is a lower detection limit of 0.3 µM for ASV. Such a biosensing assay can also prove a great potential for the determination of Morin in dry tea.