On the subcritical extraction of Rosa damascena Mill.

Ana Dobreva1, Ivayla Dincheva2 and Nenko Nenov3
1Agricultural Academy, Institute for Roses and Aromatic Plants, 6100 Kazanlak, Bulgaria
2Agricultural Academy, AgroBioInstitute, 1164 Sofia, Bulgaria
3University of Food Technologies, 4000 Plovdiv, Bulgaria

Abstract

Dobreva, A., Dincheva, I. & Nenov, N. (2021). On the subcritical extraction of Rosa damascena Mill. Bulg. J. Agric. Sci., 27 (4), 785–791

Subcritical extraction of Rosa damascena Mill. was performed with Freon 143a. The pressure and duration of the process were studied to obtain the yield. It was found that a short-time triple extraction at low pressures of 5-6 bar resulted in the highest yield – 0.151%. The chemical composition of the product revealed a high scent content: β-phenylethyl alcohol (25.6 – 54.1%), citronellol (1.5 – 2.3%), geraniol (1.0 – 3.9%) and nerol (1.9 – 2.9%). The distribution of paraffins’ content was: nonadecane (2.7 – 4.9%), nonadecene (3.1 – 5.6%), eicosane (4.4 – 11.6%) and heneicosane (4.4 – 9.8%). The deviations in the constituents of the day product and the year batch production were discussed. The yield and composition were compared with other rose aromatic products. The content of methyleugenol, potential genotoxic and carcinogenic agent was regular low (0.4 – 0.8%), comparing the essential oil (up to 4%).

Keywords: Rosa damascena Mill.; subcritical extraction; scent compounds; methyleugenol
Abbreviations: TFE – 1,1,1,2-tetrafluoroethane

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