engleski

Extraction of essential oil and absolute from Immortele

Helichrysum italicum, commonly named as Immortelle or Everlasting is widely distributed in the Mediterranean basin where it grows naturally in the dry, sandy and stony areas. Immortelle is used in traditional medicine due to its anti-inflammatory, antibacterial and antiallergic antioxidant activity. It is used both in cosmetics and in pharmaceutical preparations. Recently, its repellent and insecticidal activity has been proved. Immortelle essential oil can be obtained from all aerial parts of the plant. The composition of the essential oil is influenced by the vegetative cycle and the soil type as well as the geographical location. The aim of this work was to extract essential oil and absolute from Immortelle. The aerial parts of Immortelle were harvested at the end of its flowering stage at the beginning of October. Immortelle essential oil was produced by hydrodistillation while immortelle absolute was produced by simple solvent extraction and Soxhlet extraction with ethanol and n-hexane. Homogeneous samples of the flowering top and stems were distilled or extracted separately. The yield of the essential oil obtained by hydrodistillation was 0.15% (w/w). The maximum yield of absolute obtained by Soxhlet extraction was 6.78 % (ethanol) and 1.37 % by solvent extraction (n- hexane). Isolated and purified products were analyzed by FTIR and GCMS. Immortelle essential oil and absolute exhibited a very complex composition, depending on the method and solvent used as well as the freshness of the plant. All products obtained by atmospheric hydrodistillation and extraction are characterized by a high amount of sesquiterpenes. Vacuum hydrodistillation results with high concentration of esters.

Immortele ; extraction ; oil ; absolute

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