Microwave-assisted green extraction of antioxidant components from Osmanthus fragrans (Lour) flower using natural deep eutectic solvents

Pan, Chenghui; Zhao, Laijun; Zhao, Dayun

doi:10.1016/j.jarmap.2020.100285

Cited by 24 publications

(20 citation statements)

References 39 publications

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“…The differences in the results of the antioxidant assays determined by two different tests can probably be explained by the different mechanisms of action. ABTS are hydrogen atom transfer-based assays that quantify the ability to donate hydrogen atoms, whereas FRAP is an electron transfer-based assay that measures antioxidant reduction capacity [50]. It is also worth noting that the reduction of the iron(III)-tripyridyltriazine (Fe 3+ -TPTZ) complex to iron(II)-tripyridyltriazine (Fe 2+ -TPTZ) is a pH-dependent process [36], and among the NADES tested, the lactic acid-based NADES had the lowest pH, resulting in a dramatic increase in the measured FRAP value.…”

Section: Extraction Of the Phenolic Compounds Of A Millefolium With N...mentioning

confidence: 99%

Extraction of Bioactive Metabolites from Achillea millefolium L. with Choline Chloride Based Natural Deep Eutectic Solvents: A Study of the Antioxidant and Antimicrobial Activity

et al. 2022

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In this study, the extraction efficiency of natural deep eutectic solvents (NADES) based on choline chloride as a hydrogen bond acceptor (HBA) and five different hydrogen bond donors (HBD; lactic acid, 1,4-butanediol, 1,2-propanediol, fructose and urea) was evaluated for the first time for the isolation of valuable bioactive compounds from Achillea millefolium L. The phytochemical profiles of NADES extracts obtained after ultrasound-assisted extraction were evaluated both spectrophotometrically (total phenolic content (TPC) and antioxidant assays) and chromatographically (UHPLC-MS and HPLC-UV). The results were compared with those obtained with 80% ethanol, 80% methanol, and water. The highest TPC value was found in the lactic acid-based NADES (ChCl-LA), which correlated with the highest antioxidant activity determined by the FRAP analysis. On the other hand, the highest antiradical potential against ABTS+• was determined for urea-based NADES. Phenolic acids (chlorogenic acid and dicaffeoylquinic acid isomers), flavones (luteolin and apigenin), and their corresponding glucosides were determined as the dominant individual phenolic compounds in all extracts. The antibacterial and antifungal properties of the extracts obtained against four bacterial cultures and two yeasts were evaluated using two methods: the agar dilution method to obtain the minimum inhibitory concentration (MIC) and the minimum bactericidal or fungicidal concentration (MBC or MFC), and the disc diffusion method. ChCl-LA had the lowest MIC and MBC/MFC with respect to all microorganisms, with an MIC ranging from 0.05 mg mL−1 to 0.8 mg mL−1, while the water extract had the weakest inhibitory activity with MIC and MBC/MFC higher than 3.2 mg mL−1.

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Section: Extraction Of the Phenolic Compounds Of A Millefolium With N...mentioning

confidence: 99%

Extraction of Bioactive Metabolites from Achillea millefolium L. with Choline Chloride Based Natural Deep Eutectic Solvents: A Study of the Antioxidant and Antimicrobial Activity

et al. 2022

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“…Similar trends were reported by Sánchez-Reinoso and co-authors, who used the MAE and Soxhlet extraction method for the extraction of Sacha inchi shell extracts [ 32 ]. Also, Pan et al, observed the same fact when extracting oil from Osmanthus fragans flower using MAE with deep eutectic solvents and reflux extraction with ethanol [ 34 ].…”

Section: Resultsmentioning

confidence: 86%

“…In the ABTS assay, the activity is based on the capacity of the Curcuma longa L. oil to decrease the amount of ABTS •+ cation radical preformed in the solution. This reducing capacity of Curcuma longa L. oil is an important indicator of their antioxidant capacity [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

Microwave-Assisted Extraction of Curcuma longa L. Oil: Optimization, Chemical Structure and Composition, Antioxidant Activity and Comparison with Conventional Soxhlet Extraction

et al. 2021

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Curcuma root (Curcuma longa L.) is a very important plant in gastronomy and medicine for its unique antiseptic, anti-inflammatory, antimicrobial and antioxidant properties. Conventional methods for the extraction of curcuma oil require long extraction times and high temperatures that can degrade the active substances. Therefore, the objectives of the present study were: (i) first, to optimize the extraction yield of curcuma oil by applying a Box-Behnken experimental design using surface response methodology to the microwave-assisted extraction (MAE) technique (the independent variables studied were reaction time (10–30 min), microwave power (150–200 W) and curcuma powder/ethanol ratio (1:5–1:20; w/v); and, (ii) second, to assess the total phenolic content (TPC) and their antioxidant activity of the oil (at the optimum conditions point) and compare with the conventional Soxhlet technique. The optimum conditions for the MAE were found to be 29.99 min, 160 W and 1:20 w/v to obtain an optimum yield of 10.32%. Interestingly, the oil extracted by microwave-assisted extraction showed higher TPC and better antioxidant properties than the oil extracted with conventional Soxhlet technique. Thus, it was demonstrated that the method applied for extraction influences the final properties of the extracted Curcuma longa L. oil.

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“…This is because that the addition of water can reduce the viscosity of the solution and regulate the polarity of the solution, which is beneficial to increase the dissolution rate of the compounds. However, a further increase in water contents reduced the extraction yield because high water content will destroy the interactions between the DES and target components [35] , [36] . Considering the extraction yield of GLA and ISL, ChLa with 20% water content and a molar ratio of 1:1 was selected for the subsequent extraction experiments.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound-assisted deep eutectic solvents extraction of glabridin and isoliquiritigenin from Glycyrrhiza glabra: Optimization, extraction mechanism and in vitro bioactivities

Chen

Cui

Zhang

et al. 2022

Ultrasonics Sonochemistry

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Microwave-assisted green extraction of antioxidant components from Osmanthus fragrans (Lour) flower using natural deep eutectic solvents

Cited by 24 publications

References 39 publications

Extraction of Bioactive Metabolites from Achillea millefolium L. with Choline Chloride Based Natural Deep Eutectic Solvents: A Study of the Antioxidant and Antimicrobial Activity

Extraction of Bioactive Metabolites from Achillea millefolium L. with Choline Chloride Based Natural Deep Eutectic Solvents: A Study of the Antioxidant and Antimicrobial Activity

Microwave-Assisted Extraction of Curcuma longa L. Oil: Optimization, Chemical Structure and Composition, Antioxidant Activity and Comparison with Conventional Soxhlet Extraction

Ultrasound-assisted deep eutectic solvents extraction of glabridin and isoliquiritigenin from Glycyrrhiza glabra: Optimization, extraction mechanism and in vitro bioactivities

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