It comes in contact with the rest of the solvent, resulting
in one ninth quantity of solution mining. The two
liquids extract and filter together after another 24 hours.
Owing to the relatively reduced thermal stability of
natural aromatic compounds, the process was conducted
in the presence of the antioxidant ascorbic acid (0.5% w/
v) [43]. Extraction rate (1: 10 g of flowers powder/mL
solvent).