Supercritical CO2 extraction of chlorogenic acid from sunflower (Helianthus annuus) seed kernels: modeling and optimization by response surface methodology

Valorization of sunflower by-product using microwave-assisted extraction to obtain a rich protein flour: Recovery of chlorogenic acid, phenolic content and antioxidant capacity

“…CGA was quantified in extracts obtained from sunflower seed cake using ultrasound-assisted extraction and different ethanol concentrations (0-85%) and a yield ranged from 609 to 1635 mg CGA/100 g of raw material was reported (Zardo et al, 2019). Daraee et al (2019) obtained a maximum recovery of CGA of 52.08% from sunflower seed kernels using ethanol as co-solvent in the supercritical CO2 extraction in comparison to Soxhlet method. Weisz et al (2009) investigated the conventional extraction of CGA using aqueous methanol (60%, v/v) of the shells and of the kernels from sunflower (Helianthus annuus L.) and found 59.1 mg/100 g and 3050.5 mg/100 g, respectively.…”

“…Chemically, phenolic compounds are able to interact with proteins by changing their solubility, digestibility, their shelf life and stability, and their organoleptic properties (green dark color due to oxidation of phenolic compounds) (González-Pérez and Vereijken, 2007;Kroll et al, 2001;Kroll et al, 2000;Sastry and Rao, 1990). Unlike undesirable effects, CGA has biological properties including antioxidant, anti-allergenic, anti-inflammatory, anti-microbial, anti-obesity and anti-thrombotic, and therefore, the CGA extracted from sunflower by-product can be used in the manufacture of pharmaceutical, cosmetic and food ingredients (Daraee et al, 2019;Naveed et al, 2018).…”

Supercritical Carbon Dioxide Extraction of Phenolic Compounds from Potato (Solanum tuberosum) Peels

“…Additionally, the vast majority of the works from the literature that do report some success in extracting CGA via SFE employed plant leaves or flowers as matrices, such as Hibiscus sabdariffa [49], Lonicera japonica [50], and Chrysanthemum indicum [51], which most likely present a simpler structure than the starch-rich peels used in this study, facilitating CGA extraction. The only two exceptions to this involved the use of aqueous solvent solutions as cosolvents: The work of Daraee et al [52], who successfully recovered 52% of the initial CGA content of samples of sun flower seed kernels with a SFE performed at 180 bar, 40 • C, 105 min, 5% ethanol as cosolvent, and 1.6 mL/min (=1.3 g/min) of CO 2 flow rate; and the SFE of apple peel [37], in which the authors used 4% of water in their ethanolic solution employed as a cosolvent at a 25% cosolvent-to-solvent concentration [37]. Even so, the recovery of CGA was comparatively low.…”

The Effect of the Co‐Solvent on the Aerogel Formation Directly in Supercritical CO2 Medium

“…Previously, mixtures of scCO 2 with various organic compounds such as acetone, ethanol, dimethyl ether, chlorodifluoromethane, and others were successfully used as the medium for the solubilization of polymers. The effect of increasing the solubility of compounds in scCO 2 is well known and finds application in the catalysis of oxidation reactions, nanocomposite formation, impregnation, chromatography and extraction …”