Effect of pulsed electric fields on yield and chemical composition of rose oil (Rosa damascena Mill.)

Tintchev, Filip; Dobreva, Ana; Schulz, Hartwig GND; Toepfl, Stefan

To improve the comparatively low oil yield, pulsed electric fields have been applied on fresh rose blossoms with an energy input of 10 kJ/kg as well as 20 kJ/kg. It was reported a rise in yield of 2- 46 %, additionally the distillation time could be reduced. An increase of ratio terpene alcohols/hydrocarbones from 33 % to 285 % was observed in treated rose oil. To elucidate the influence on petal structure, scanning electron microscopy was used. The determination of yield increase, chemical composition and olfactory evaluation showed that a pulsed electric fields treatment at 10 kJ/kg was optimal with regard to product yield and quality.

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Tintchev, Filip / Dobreva, Ana / Schulz, Hartwig / et al: Effect of pulsed electric fields on yield and chemical composition of rose oil (Rosa damascena Mill.). 2012.

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