Flavor extraction is done by using steam distillation in essential oil distillation plant.An essential oil is a concentrated hydrophobic liquid containing volatile aroma compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetherolea, or simply as the "oil of" the plant from which they were extracted, such as oil of clove. An oil is "essential" in the sense that it contains the characteristic fragrance of the plant that it is taken from. Raw plant material, consisting of the flowers, leaves, wood, bark, roots, seeds, or peel, is put into an alembic (distillation apparatus) over water, As the water is heated, the steam passes through the plant material, vaporizing the volatile compounds. The vapors flow through a coil, where they condense back to liquid, which is then collected in the receiving vessel.
Ok Thanks.But does all volatiles are captured into distillate???? What is the efficiency of extraction in %??
What about extraction with supercritical CO2? There is plenty of studies of extraction of different oils using this process.
yes it is one of the good technique. But as of now we dont have it, in future we may buy it.
I have got good volatile profile by using solvent but I don't know efficiency of it.
Continuous liquid-liquid extraction works well at scales of hundreds of grams to a few kilograms. APPS, P.J. and LIM AH TOCK, M. 2005. Enhanced flavour extraction in continuous liquid-liquid extractors. Journal of Chromatography A 1083: 215 – 218.
For GC analysis sample prep Solid Phase MicroExtraction is worth trying.
Yes we tried SPME. Most of esters which we havn't got in solvent extraction are captured in SPME.
Hi Survana
Esters, being non-polar, should extract well from fruits and juices into non-polar solvents. If they are volatile perhaps you have been losing them from the extracts when you concentrate the extracts.
Are you aiming exclusively at GC sample prep, or do you need the extracts for other purposes also ?
Dr Roman Kaiser who used to work for your company established very powerful sample prep techniques for aromas, based on purge and trap sampling.
Peter
My purpose is only analysis. I am not going to do anything further with extract. It is for flavour creation. Can u elaborate more on Purge and Trap.....
Hi Suvarna
Roman Kaiser worked for Givaudan, doing aroma creation from natural flower scents. I am sure that you can access all the details on his methods in your company literature.
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