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The quantification of ellagic acid in the crude extract of Phyllanthus amarus Schum. & Thonn. (Euphorbiaceae)



The quantification of ellagic acid in the crude extract of Phyllanthus amarus Schum. & Thonn. (Euphorbiaceae)



Phytochemical Analysis 22(4): 361-366



Phyllanthus amarus Schum. & Thonn. (Euphorbiaceae), already well known for its antiviral, antihyperglycaemic and antihepatotoxic effects, is also investigated for its antimalarial activity. The major constituent of the crude extract of the whole plant was isolated and identified in this research to be ellagic acid, for which antiplasmodial activity already has been reported. Because of the potential of the plant and the interesting properties of ellagic acid, an analytical method can be useful for the standardisation of the extracts to allow further biological and pharmacological investigations. In order to obtain an easily performable and inexpensive method, an HPLC analysis was developed and validated. The samples were dissolved in DMSO, ultrasonicated for 15 min, and diluted with 50% methanol. Analysis was performed using water and methanol containing 0.06% TFA and the peaks were detected at 254 nm. Ellagic acid showed a linear relationship in the range of 1.74-20.91 µg/mL and a single-point calibration was allowed. The method was shown to be precise with respect to time (RSD of 1.84%, 3 days, n = 6) and concentration (RSD of 2.54%, 3 levels, n = 6). The overall mean content of ellagic acid was 2.06%. A recovery experiment was performed and it showed an accuracy of 100.4%. Based on the obtained results, it can be concluded that the newly developed method is suitable for its purpose, namely the determination of ellagic acid in the crude extract of P. amarus.

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Accession: 056452173

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PMID: 21204153

DOI: 10.1002/pca.1288


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