Pak. J. Bot., 41(2): 615-620, 2009.

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			Updated: 09-07-09
	PHYSICO-CHEMICAL ANALYSIS AND DETERMINATION OF VARIOUS CHEMICAL CONSTITUENTS OF ESSENTIAL OIL IN ROSA CENTIFOLIA M. KHALID SHABBIR¹, RAZIYA NADEEM¹, HAMID MUKHTAR², FAROOQ ANWAR¹ ANDMUHAMMAD W. MUMTAZ¹, Abstract: This paper reports the isolation and characterization of essential oil of Rosa centifolia. The oil was extracted from freshly collected flower petals of R. centifolia with petroleum ether using Soxhlet apparatus. Rosa centifolia showed 0.225% concrete oil and 0.128% yield of absolute oil. Some physico-chemical properties of the extracted oil like colour, refractive index, congealing point, optical rotation, specific gravity, acid number and ester number were determined and were found to be yellowish brown, 1.454 at 34⁰C, 15°C, -32.50 to +54.21, 0.823 at 30^oC, 14.10245 and 28.1876. High-resolution gas liquid chromatographic (HR-GLC) analysis of the essential oil of R. centifolia, showed the phenethyl alcohol, geranyl acetate, geraniol and linalool as major components whereas, benzyl alcohol, benzaldehyde and citronellyl acetate were detected at trace levels. ¹Department of Chemistry, University of Agriculture, Faisalabad, Pakistan ²Institute of Industrial Biotechnology, Govt. College University, Lahore 54000 Pakistan, ³Department of Chemistry, University of Gujrat, Pakistan

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