AI Article Synopsis

  • - The study compares the yield and properties of peppermint essential oil (EO) extracted using hydro-distillation (HD) and supercritical fluid extraction (SCFE) methods, finding a higher yield for HD (0.20%) compared to SCFE (0.13%).
  • - Chemical analysis showed that menthol was the main component in both extraction methods, but SCFE-EO exhibited stronger antioxidant and antimicrobial activities than HD-EO, specifically with significant free radical inhibition and larger inhibition zones against certain bacteria.
  • - Overall, SCFE is suggested to be a more effective method for producing high-quality peppermint EO, making it a promising candidate for developing nutra-pharmaceutical products.

Article Abstract

This study reports the comparative evaluation of yield, physico-chemical composition and biological attributes (antioxidant activity, antimicrobial activity, biofilm inhibition and hemolytic activity) of peppermint ( L.) essential oil (EO) obtained by hydro-distillation (HD) and supercritical fluid (CO) extraction (SCFE) methods. The yield (%) of EO obtained by HD (0.20 %) was significantly ( < 0.05) higher than that of SCFE (0.13 %) while the variation in the physical parameters like solubility, color, density (at 25 °C) and refractive index (at 25 °C) was not significant between the tested oils. The data of chemical compositional analysis revealed that menthol was the key component in the EO obtained by HD (52.85 %) and SCFE (45.51 %), followed by menthone [HD (25.93 %) and SCFE (27.3 %)] and eucalyptol [HD (8.59 %); SCFE (8.92 %)]. The EO extracted with supercritical fluid (SCFE-EO) exhibited superior ( < 0.05) DPPH free radical inhibition potential (52 %) with an IC value of 15.65 μg/mL and reducing power compared to that of HD-EO. The highest antimicrobial activity was exhibited by SCFE-EO against with an inhibition zone of 18.00 mm (MIC value of 86 μg/mL). The results of biofilm inhibition and hemolytic activity revealed that the SCFE method was superior to recover high quality EO in comparison to the HD method. The peppermint EO obtained by SCFE, owing to potent bioactive components, can be a potential candidate to develop nutra-pharmaceuticals.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11365357PMC
http://dx.doi.org/10.1016/j.heliyon.2024.e35282DOI Listing

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