What You Need to Know
By reducing the ambient pressure to 50–80 mmHg, the boiling points of solvent–herb mixtures drop, allowing extraction at 30–45 °C. This mild temperature regime preserves heat‑labile terpenes and flavonoids while minimizing thermal degradation of alkaloids. Precise pressure control is essential to avoid over‑extraction and contamination.
The Science
Primary Reaction
Extraction of volatile aromatic compounds via reduced pressure-induced boiling