What You Need to Know
Controlled toasting (120–150 °C, 2–5 min) thermally desorbs essential oils while avoiding oxidation of heat‑labile terpenes. Subsequent grinding to 200–400 µm maximizes surface area for solvent extraction, but prolonged grinding generates friction heat that degrades aromatic terpenes and phenolics.
The Science
Primary Reaction
Thermal desorption of volatile essential oils and mechanical increase of surface area leading to enhanced solvent‑mediated extraction.