2. MATERIALS AND METHODS
2.1. Chemicals. Carbon dioxide (BIOGON C Liquid E290
food industry grade, purity ≥99.9%) was supplied from Linde,
and ethanol (absolute GR for analysis, ≥99.9%) and hexane
(GR for analysis ≥99%) were purchased from Merck. Purified
deionized water was produced in the lab using a two bed ionic
resin system (conductivity