The effect of extraction methods on quantity and quality of Rose oil.
2007
Assareh, Mohammad Hassan | Sefid Kon, Fatemeh | Mirza, Mahdi | Asgari, Fatemeh | Reza`i, Mohammad Baqer
Rosa damascena Mill. is one of the important Rose species for production of aromatic compounds.The oil and distilled water of Rose are used vastly in medicinal,hygienic cosmetic and food industries.In iran,there are vast gardens of Rosa damascene in Kashan,Kerman,Trabriz,Sahand and Fars province. In this research,the effect of different extraction methods on Yield and chemical composition of four Rosa damascena samples(two samples from national botanical garden of Iran with source of Kashan and Oskou,one sample from Kashan and one sample from Chaloos road)were examined.The aromatic compounds were obtained by four extraction methods consist of two distillation methods(hydro-distillation and water&steam distillation)and extraction with organic solvents(by uase of hexane and petroleum ether,individually).The yields ofessential oils(from distillation methods)and concrete and absolute(from solvent extraction)were calculated.The oils and absolutes were analyzed by GC and GC/MS. The results showed that distillation methods produced higher percentage of citronellol and sometimes geraniol, but the valuable compound,phenyl ethyl alcohol,was not found in the oils orexist in very low amount.In solvent extraction methods,the percentage of phenyl athyl alcohol was considerably high and citronellol and also geraniol were found in the absolutes,of course in lower amounts.There were also some differences between the minor components. In the tables, the differences between yield and chemical composition of all oils and extracts have been shown.
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