Obtaining artemisinin and its derivatives is very costly, which limits access to low-income people. Some hydroalcoholic extract of Artemisia annua L., Asteraceae, which has shown comparable antimalarial activity could be an alternative to the purified compound, especially if the cultivars have higher content of artemisinin. The objective of this study was to evaluate the effects of the extraction parameters (ethanol graduation, previous shaking time in an ultrasound bath and drug/solvent ratio) on the yield of artemisinin in the liquid extract obtained by percolation from A. annua and then optimize the extraction efficiency of this compound. The Box-Behnken (33) factorial design was used in association with response surface methodology. The derivatization reaction of artemisinin was used in an analytical method which was submitted to validation, after reaching the specification of the selectivity, linearity, precision, accuracy and robustness. Detection and quantification limits were 1.3 and 4.0 μg/ml, respectively. The largest amount of this compound of interest was obtained without any ultrasound bath, with an ethanol graduation of 95% and a drug/solvent ratio of 2%. Drug/solvent ratio was the factor which most influenced extraction efficiency. The maximum range of artemisinin yield was 1.21%. Information obtained in this study can be used for future approaches to determining and extracting artemisinin from A. annua.
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EOS: acquisition of the data, analysis and interpretation of the data, drafting of the article; LLB: statistical expertise, drafting of the article; ECC: conception and design, provision of study materials; MTFB: conception and design, provision of study materials, obtaining of funding, drafting of the article.
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de Silva, E.O., Borges, L.L., da Conceição, E.C. et al. Box-Behnken experimental design for extraction of artemisinin from Artemisia annua and validation of the assay method. Rev. Bras. Farmacogn. 27, 519–524 (2017). https://doi.org/10.1016/j.bjp.2017.03.002
- Medicinal plant
- Extraction process
- Box-Behnken factorial design
- Response surface methodology