Chromatographic Isolation and Spectroscopic Characterization of Flavonoid Bioactives from Moringa oleifera Lam

Research Article

Abstract

Moringa oleifera Lam., widely recognized as the miracle tree, represents a significant source of high-value secondary metabolites with profound pharmacological implications. The leaves of this species contain an intricate matrix of phytochemicals, including alkaloids, saponins, tannins, and specifically, a rich profile of polyphenolic flavonoids. Systematic extraction using 96% ethanol facilitates the recovery of these bioactive constituents, which are subsequently subjected to qualitative screening to verify the presence of diverse chemical classes. Separation through silica gel column chromatography using an n-butanol, acetic acid, and water solvent system yields distinct fractions, among which specific isolates show high concentrations of flavonoid compounds. Thin-layer chromatography serves as a critical tool for monitoring the resolution of these compounds, with retardation factor values aligning closely with established standards for flavonol derivatives. Spectroscopic Studies via Ultraviolet-Visible and Fourier Transform Infrared techniques showed characteristic absorption maxima and functional group vibrations, such as phenolic hydroxyl stretching and conjugated carbonyl signals, consistent with the structural architecture of quercetin. Quantitative estimations indicate varying levels of flavonoid density across isolated fractions, with peak purity levels reaching approximately 77.99% relative to standard benchmarks. The presence of these metabolites explains the robust antioxidant, anti-inflammatory, and hepatoprotective properties attributed to the plant. These results provide a scientific basis for the utilization of Moringa oleifera in the formulation of nutraceuticals and functional food ingredients.