Quantitative Estimations for the Volatile Oil by Using Hydrodistillation and Microwave Accelerated Distillation Methods from Ruta graveolens L. and Ruta chalepensis L. leaves from Jerusalem Area / Palestine
Background:
In the recent years new technique s were applied for extraction and isolation
of natu ra l phytochemicals from living organisms by using microwaves to
assist extraction , decrease the time and cost of isolation methods in the same ti me these
methods must gua rantee the highest yield from the plants. Objectives:
this research aimed to evaluate two methods of volatile oils extraction, the
microwave accelerated distillation and
hydrodistillation also to find the best source of Rue oil Rut a graveolens or Ruta chalepensis leaves. In this research , the effect of microwave power on
the yields of volatile oils in R . graveolens
and R . chalepensis is the first time
proven in the literature. Method: Microwave accelerated distillation was
applied f or the extraction of volatile oil
s from the leaves of Ruta graveolens and Ruta chalepensis . The microwav e assisted
extraction method had been compared with hydro distillation conventional technique, in terms of extraction
yields , cost and time . Results: The volatile
oils of the dried Ruta graveolens collected
from the Jerusalem area of Palestine were recovered by microwave accelerated
distillation method with approximately 2.2 % yield in Ruta
graveolens and approximately 1.8% yield
of the volatile oils in Rut a
chalepensis on a dry weight basis , in
the same time the yield was
approximately 1.2% in Ruta graveolens while was 0.6% yield of the volatile oils in Ruta chalepensis by using hydrodistillation method. Conclusion:
The results show ed that the isolation
of the volatile oils from R. graveolens and R. chalepensis by microwave assisted extraction is more
efficient in time cost and yield rather than hydrodistillation; also the results showed that the best economical source
for Rue oil is R. graveolens for food, cosmeceuticals and pharmaceutical industries