Extraction, Optimization and Characterization of Essential oil from Vetiver (vetiveria zizanioides) Grass Root by Steam Distillation for Perfume Application
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Date
2017-07
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Addis Ababa University
Abstract
The extraction of essential oils from natural sources is a highly profitable now a days.
Vetiver grass is a viable vegetative absorbent and erosion barrier; in addition the valuable
oils extracted from its roots are playing an increasing role in the perfume, food and
pharmaceutical industries
The yield of essential oil that extracted from the vetiver grass root depends strongly on
extraction parameters and method of extraction such as time, temperature and particle
size are vital components for efficient processing of essential oil extraction. The
experimental investigations undertaken using steam distillation has been determined a
maximum average yield of (1.72%) after extraction time of 6 hours, particle size range of
(0.425-0.75mm) and temperature of (95oC) and the minimum average yield was obtained
(0.15%) was found at extraction time of 2hr, temperature of (75oC) and particle size of
(1.075-1.4mm). From this statement, an increasing of extraction time, temperature and
decreasing of particle size will increase the percentage yield of oil extract. The
investigating of individual and interaction effect has been described by using excel graph
and DESIGN EXPERT software (general full factorial) was applied to the extraction
processes.
The composition of the vetiver oil extracts were analyzed using gas chromatographymass
spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FT-IR)
techniques and this showed that, a high percentage was obtained ((3S, 3aR, 6R, 8aS)-7,
7-dimethyl-8 methyleneoctahydro-1H-3a,6-methanoazulen-3-yl) methanol in a peak
retention time of (16.780min) and high percentage of area was obtained (23.37%).
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Process Engineering