Pharmacognostical, Phytochemical and Physicochemical Standardization of Phyllanthus amarus Schumach. & Thonn
Keywords:
Phyllanthus amarus, Standardization, Pharmacognosy, Physicochemical evaluation, Phytochemical screening, Phyllanthin, HPTLC, Herbal quality controlAbstract
Background: Phyllanthus amarus Schumach. & Thonn. is a medicinal herb widely used for hepatic, metabolic, inflammatory, and urinary disorders. Variations in origin, season, processing, and substitution with related species necessitate reliable standards for authentication and quality control.
Objective: To establish pharmacognostical, physicochemical, and phytochemical parameters for the whole plant of Phyllanthus amarus.
Materials and Methods: The authenticated plant was evaluated using organoleptic, macroscopical, microscopical, and powder-microscopical methods. Physicochemical parameters such as foreign matter, moisture, ash values, extractive values, foaming index, swelling index, and crude fibre were determined. Fluorescence analysis was performed with chemical reagents. Extracts were prepared using petroleum ether, chloroform, ethyl acetate, ethanol, methanol, hydroalcohol, and water, and yields were calculated. Preliminary phytochemical screening, estimation of total phenolic and flavonoid contents, and chromatographic fingerprinting with phyllanthin as a marker were conducted.
Results: The powdered drug was greenish-brown, bitter-astringent, with characteristic odour. Microscopy revealed epidermal tissues, stomata, vascular elements, lignified fibres, calcium oxalate crystals, starch grains, and cork fragments. Physicochemical values included foreign matter 0.82%, loss on drying 8.24%, total ash 7.64%, acid-insoluble ash 1.12%, water-soluble extractive 18.42%, and alcohol-soluble extractive 14.26%. Hydroalcoholic extract showed the highest yield (18.52% w/w). Phytochemical screening confirmed flavonoids, phenolics, tannins, glycosides, saponins, and lignans. Total phenolic and flavonoid contents were 82.46 mg GAE/g and 46.72 mg QE/g extract. Chromatographic fingerprinting revealed multiple bands including phyllanthin.
Conclusion: The integrated pharmacognostical, physicochemical, phytochemical, and chromatographic parameters provide a comprehensive quality-control profile for Phyllanthus amarus, aiding authentication, detection of adulteration, batch consistency, and standardization of herbal formulations.
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