Naslov
THE INFLUENCE OF ULTRASONIC PRETREATMENT PRIOR HYDRODISTILLATION OF ROSMARINUS ON THE YIELD OF ESSENTIAL OIL

Autori
Dent, Maja ; Nikin, Lucija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Natural resources green technology & sustainable development / Radojčić Redovniković, Ivana ; Jakovljević, Tamara ; Stojaković, Renata ; Erdec, Dina ; Damjanović, Anja - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2022, 72-72

Skup
4th Natural resources, green technology and sustainable development/4 (GREEN2022)

Mjesto i datum
Zagreb, Hrvatska, 14.09.2022. - 16.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
essential oil, hydrodistillation, rosmarinus, ultrasound

Sažetak
In recent years, new pre-treatments prior hydrodistillation of plant material have been intensively investigated, with the aim of increasing their yield. The aim of this study was to investigate whether ultrasonic pretreatment prior Clavenger hydrodistillation could increase the yield of rosemary (Rosmarinus officinalis L.) essential oil. The hydrodistillation was preceded by ultrasonic pretreatment (ultrasonic output power of 200 W, a probe diameter of 14 mm) for 5, 10, 20, 30 and 40 minutes of extraction time. Ultrasonic pretreatments increased the yield of rosemary essential oil for 50 % compared to the negative control after 5 and 10 minutes, while with a longer time of ultrasonic pretreatment there was no increase in the yield of rosemary essential oil. After ultrasonic pretreatment of rosemary, enzymatic pretreatment with the addition of cell-degrading enzymes xylanase-pectinase- cellulase (1:1:1) was performed at 40 ˚C for 4 h. However, enzymatic pretreatment did not increase oil yield compared to ultrasonic pretreatment and negative control. This suggests that the increase in oil yield is caused by ultrasonic pretreatment after only 5 and 10 minutes, and not the enzymatic activity that did not show an increase in the yield of essential oil. In the production of essential oils, hydrolate is formed as a by- product, which has a strong antioxidant capacity determined by the FRAP method. In conclusion, the results of this study showed that ultrasonic pretreatment prior hydrodistillation can be useful in the production of rosemary essential oil, the main advantage is an increase in oil content by 50% after only 5 and 10 minutes of ultrasonic pretreatment.

Izvorni jezik
Engleski

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