Polyvinyl caprolactam polyvinyl acetate polyethylene glycol graft copolymer soluplus

Polyethylene Glycol 400 (pure, pharma grade; PEG 400), sodium chloride, hydrochloric acid, acetic acid, sodium hydroxide and monobasic potassium phosphate were purchased from Synth (Sao Paulo, SP, Brazil). Acetonitrile (HPLC grade) was acquired from Honeywell Riedel-de-Haën (Morris Plains, NJ, USA). β-caryophyllene (CAR; standard with purity ≥ 80%) was purchased from Sigma-Aldrich (Saint Louis, MO, USA). Polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus^®; SOL) was kindly donated by BASF (Ludwigshafen am Rhein, Germany) and ultra-purified water was obtained in-house using a water purification system (Evoqua Water Technologies, Pittsburgh, PA, USA). The copaiba oil-resin (CO) from Copaifera reticulata Ducke was obtained from Copaíba da Amazônia company that sustainably obtains CO from rainforest trees at the agroextractive association Aripuana/Guariba (Apui, AM, Brazil). The collection and use of CO were authorized and follow the environmental legislation of the National System of Authorization and Information on Biodiversity (SISBIO n° 72922-1) and the National System of Genetic Heritage Management (SISGEN n° AE28797).