Resumo

MEYER TORRES, Golda; SARMIENTO, Olga Isabel; RAMIREZ, Ruth Isabel  e  GUEVARA, Osvaldo. Evaluation of the performance of the calendula essential oil (Calendula Officinalis L) obtained by OAHD. Rev. ion [online]. 2018, vol.31, n.1, pp.13-19. ISSN 0120-100X.  https://doi.org/10.18273/revion.v31n1-2018002.

In this work yield (%v/w) of calendula essential oil (Calendula officinalis L.) obtained by two methods, hydrodistillation (HD) and ohmic-assisted hydrodistilation (OAHD) was determined; fresh flowers (Ff) and dried flowers (Fs) were used. The effect of the extraction methods and the state of the flower on the total extraction time (min), oil accumulation time (min) and extraction yield (amount of oil extracted, mL per 100 grams of plant material) was evaluated. The results showed significant differences (p<0.05) when comparing the total time of extraction (min) and the yield (% v/w) as a function of the method of extraction and the state of the flower. The best results were obtained by OAHD method, registering yields of 1.249% for Ff and 1.289% for Fs, an indication that this is a superior extraction method when compared to hydrodistillation. Analyzing yield (% v/w) versus extraction time (min) indicates that the maximum amount of oil was registered for fresh samples both when using HD and OAHD, but when using dried flowers (Fs), longer times were registered both for HD and OAHD, therefore, the state of the plant material influenced the amount of oil obtained and the extraction kinetics.

Palavras-chave : extraction of essential oils; calendula essential oil; extraction yield; hydrodistillation; ohmic heating.

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