Selective extraction of high‐value phenolic compounds from distillation wastewater of basil (Ocimum basilicum L.) by pressurized liquid extraction. Issue 15 (16th February 2018)

• Record Type: Journal Article
• Authors: Pagano, Imma; Sánchez‐Camargo, Andrea del Pilar; Mendiola, Jose Antonio; Campone, Luca; Cifuentes, Alejandro; Rastrelli, Luca; Ibañez, Elena
• Other Names: Ibáñez Elena guestEditor.; Herrero Miguel guestEditor.
• Is Part Of: Electrophoresis. Volume 39:Issue 15(2018)
• Page Start: 1884
• Page End: 1891
• Publication Date: 2018-02-16
• Subjects: Bio‐based solvent -- Caffeic acid -- Distillation wastewater -- Pressurized liquid extraction -- Rosmarinic acid; Electrophoresis -- Periodicals; Electrophoresis -- Periodicals; 541.372
• DOI: 10.1002/elps.201700442
• Languages: English
• ISSNs: 0173-0835

Abstract

Abstract: 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.