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- W2181386194 abstract "Objective: In the present paper, an accurate High Pressure Liquid Chromatography (HPLC) method was developed and validated to determine quantitatively wedelolactone (WL) and demethylwedelolactone Methods: This study presents the High Pressure Liquid Chromatography (HPLC) analysis of the WL and DWL contents in various parts of the plant using different solvents and extraction methods. (DWL) in herbal extract of Eclipta alba (L.) Hassk grown in the Northeast of Brazil. Consequently, an extraction technique was developed using different parts of the plant and the technique was optimized to assess the efficacy of extraction using different solvents. Results: Quantitative HPLC analyses of the methanolic extract obtained via Soxhlet extraction showed that the highest WL concentration was found in the E. alba leaves (1.152 % w/w of dry leaf) and the highest concentrations of DWL were found in the stems (0.395 % w/w of dry stem). Quantitative HPLC analyses also showed a higher concentration of WL (0.271 % w/w of dry whole plant) and DWL (0.184 % w/w of dry whole plant) using water: ethanol extraction, compared with the Soxhlet extraction in methanol, concentration of WL (0.233 % w/w of dry whole plant) and DWL (0.159 % w/w of dry whole plant). Conclusion: HPLC analyses revealed the presence of the two coumestans in all the extracts analysed. Moreover, when analyzing the methanolic E. alba extract, the highest concentrations of" @default.
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- W2181386194 date "2014-01-01" @default.
- W2181386194 modified "2023-09-26" @default.
- W2181386194 title "DEMETHYLWEDELOLACTONE IN ECLIPTA ALBA (L) HASSK BY HPLC" @default.
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