Studying the Extraction Conditions on Rosmarinic Acid Content and Antioxidant Activity of Basil ( Ocimum basilicum  L.)

Anh Giang Que Pham; Tram Thi My Pham

doi:10.22146/ijc.99415

Studying the Extraction Conditions on Rosmarinic Acid Content and Antioxidant Activity of Basil (Ocimum basilicum L.)

https://doi.org/10.22146/ijc.99415

Anh Giang Que Pham⁽¹⁾, Tram Thi My Pham^(2*)

(1) Institute of Engineering and Technology, Thu Dau Mot University, Tran Van On Street No. 6, Binh Duong 820000, Vietnam
(2) Institute of Engineering and Technology, Thu Dau Mot University, Tran Van On Street No. 6, Binh Duong 820000, Vietnam
(*) Corresponding Author

Abstract

Basil (Ocimum basilicum L.), a popular herbal plant, is known for its ornamental and therapeutic importance. It has been described as having antioxidant, anti-inflammatory, hepatoprotective, immunomodulatory, antihyperglycemic, and antimicrobial properties. This study aimed to evaluate the effects of some factors on the rosmarinic acid concentration and antioxidant activity of basil extract, such as samples, solvents (water and 50% ethanol), solvent-to-sample ratios (from 1:20 to 1:70 g/mL), extraction temperature (70, 90, and 110 °C), and extraction time (30, 60, 90, and 120 min). Rosmarinic acid content was analyzed using the spectrophotometry method. The DPPH free radical scavenging experiment was also used to assess the extracts' antioxidant potential. The results showed that with the dried leaves, the ratio between the sample and 50% ethanol was 1:40 g/mL, extraction temperature of 90 °C, and extraction time of 60 min were the best conditions for obtaining rosmarinic acid from basil. The quantitative result also showed that basil extracts had a lot of polyphenols (dark green precipitate) and flavonoids (yellow precipitate). In addition, basil leaves had antioxidant properties with an IC₅₀ value of 3103.18 μg/mL. These findings showed that basil extract may be an important source of antioxidant compounds, such as rosmarinic acid.

Keywords

antioxidant; basil; extract; Ocimum basilicum L.; rosmarinic acid

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References

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DOI: https://doi.org/10.22146/ijc.99415