Currently I am researching the essential oils from rose and jasmine flowers. I am using PEF as a pretreatment in the flower before it is extracted. What are the most suitable PEF conditions so as to increase the yield of essential oil?
I am not sure why you are going to use PEF which is mostly suitable for liquid. Why you do need pretreatment and what's your objective? You mean to say drying?
I use PEF to breakdown the cell matrix in this tissue of flower. I assume when the matrix breakdown then the yield of volatile oil can increase. I need pretreatment because the yield of oil is low, I want to increase that. Thanks
We have performed work on winning of rose oil. After PEF application yield of a vapor distillation was increased and distillation time could be reduced. PEF systems for solids are available up to 50 t/h scale.
Tintchev, F.; Dobreva, A.; Schulz, H.; Toepfl, S. (2012)
Effect of pulsed electric fields on yield and chemical composition of rose oil (Rosa damascena Mill.)
Journal of Essential Oil Bearing Plants: 15, 6, p:876-884
Volatile constituents of essential oils exist in free and bound (corresponding glucosides) forms. In herbaceous crops, simple shade or sun drying releases the bound forms thereby increasing the yield to a small extent, but in other crops such drying may have an adverse effect. Acid treatment also may release the bound forms. You may think of alternate methods to target the bound volatiles.
Best wishes and good luck.
PEF is also suitable for solids with high water conent. The PEF will increase the yield of solid/liquid extraction and also improve the purity of the extract because it is a selective extraction (electroporation of crll membranes)
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