natural flavor and fragrance market will continue its
substantial rise in growth between 2017 and 2024, in
part due to an upsurge in the production of natural
personal care with essential oils and exotic aromas.
This trend has naturally expanded the investigation of extraction and processing technologies to
optimize yields from these limited resources to new
depths, and ensure their purity and quality.
Ultrasonic thyme, soxhlet ginger and pu’er tea:
For example, earlier this year, we saw ultrasound
paired with sunflower oil, rather than organic
solvents, to extract absolute from thyme. 3 Other
work compared extraction technologies—i.e.,
solvent-solvent, cold maceration and soxhlet extrac-
tion—for their resulting mineral and antioxidant
content in an edible ginger rhizome oil extract. The
highest yield was obtained by soxhlet extraction, fol-
lowed by cold maceration. Soxhlet also provided the
highest concentration of flavonoids, phenolics and
Other work using pu’er ripe tea compared
soxhlet, ultrasonic-assisted, simultaneous distillation and steam distillation extraction processes.
These findings concurred that soxhlet extraction
provided the best results. This could inspire future
work, whether the focus is to optimize the existing