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Selective extraction of high‐value phenolic compounds from distillation wastewater of basil ( Ocimum basilicum L.) by pressurized liquid extraction
Author(s) -
Pagano Imma,
SánchezCamargo Andrea del Pilar,
Mendiola Jose Antonio,
Campone Luca,
Cifuentes Alejandro,
Rastrelli Luca,
Ibañez Elena
Publication year - 2018
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201700442
Subject(s) - chemistry , extraction (chemistry) , chromatography , solvent , ethyl lactate , rosmarinic acid , distillation , solubility , ocimum , steam distillation , nutraceutical , ethanol , basilicum , caffeic acid , essential oil , organic chemistry , food science , botany , biology , antioxidant
During the essential oil steam distillation from aromatic herbs, huge amounts of distillation wastewaters (DWWs) are generated. These by‐products represent an exceptionally rich source of phenolic compounds such as rosmarinic acid (RA) and caffeic acid (CA). Herein, the alternative use of dried basil DWWs (dDWWs) to perform a selective extraction of RA and CA by pressurized liquid extraction (PLE) employing bio‐based solvent was studied. To select the most suitable solvent for PLE, the theoretical modelling of Hansen solubility parameters (HSP) was carried out. This approach allows reducing the list of candidate to two solvents: ethanol and ethyl lactate. Due to the composition of the sample, mixtures of water with those solvents were also tested. An enriched PLE extract in RA (23.90 ± 2.06 mg/g extract) with an extraction efficiency of 75.89 ± 16.03% employing a water‐ethanol mixture 25:75 (% v/v) at 50°C was obtained. In the case of CA, a PLE extract with 2.42 ± 0.04 mg/g extract, having an extraction efficiency of 13.86 ± 4.96% using ethanol absolute at 50°C was achieved. DWWs are proposed as new promising sources of natural additives and/or functional ingredients for cosmetic, nutraceutical, and food applications.