Supercritical CO2 extraction of V. vinifera leaves: Influence of cosolvents and particle size on removal kinetics and selectivity to target compounds

Melo, Marcelo M.R. de; Carius, Benedict; Simões, Mário M. Q.; Portugal, Inês; Saraiva, Jorge A.; Silva, Carlos M.

doi:10.1016/j.supflu.2020.104959

Cited by 28 publications

(20 citation statements)

References 46 publications

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“…However, it appears that ethyl acetate produces a faster extraction rate in the first 2 h. This can be a significant improvement in an industrial process where the extraction is optimized for productivity; thus, only the higher extraction rate phase is used. Similar results have been found for other biomasses such as Vitis vinifera leaves [33].…”

Section: Supercritical Solvent Modifier (Cosolvent)supporting

confidence: 88%

“…Multiple SFE processes have been proposed; for instance, for the extraction of oil and diterpenes from spent coffee grounds [27], sterols from water hyacinth [28], phenolic compounds and anthocyanins from juçara residues [29], astaxanthin and lutein from microalga [30], phenolic compounds from cacao pod husk [31], friedelin from oak tree cork [32], lupeol and β-amyrin from grape vine leaves [33], triterpenic acids from eucalyptus leaves [34], triterpenoids from acacia leaves [35], and ginsenosides from ginseng roots [36]. Melo et al provide an extensive review covering several other vegetable matrices [37].…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Tomato Residues by Supercritical Fluid Extraction

et al. 2021

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Tomato processing leads to the production of considerable amounts of residues, mainly in the form of tomato skins, seeds and vascular tissues, which still contain bioactive molecules of interest for food, pharmaceutical and nutraceutical industries. These include carotenoids, such as lycopene and β-carotene, tocopherols and sitosterols, among others. Supercritical fluid extraction is well positioned for the valorization of tomato residues prior to disposal, because it remains an environmentally safe extraction process, especially when using carbon dioxide as the solvent. In this article, we provide an extensive literature overview of the research on the supercritical fluid extraction of tomato residues. We start by identifying the most relevant extractables present in tomatoes (e.g., lycopene) and their main bioactivities. Then, the main aspects affecting the extraction performance are covered, starting with the differences between tomato matrixes (e.g., seeds, skins and pulp) and possible pretreatments to enhance extraction (e.g., milling, drying and enzymatic digestion). Finally, the effects of extraction conditions, such as pressure, temperature, cosolvent, flow rate and time, are discussed.

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Section: Supercritical Solvent Modifier (Cosolvent)supporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Valorization of Tomato Residues by Supercritical Fluid Extraction

et al. 2021

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“…According to Mohd 39 , the maximum concentration of quercitrin from the Melastoma malabthricum leaf could be extracted with an average particle size of 450 µm, using an ultrasonic extraction. In general, the extraction yield improved when reducing the particle size from crushed to powdered particle 39 , 48 , 49 . When the particle size is reduced, extraction yield increases due to a higher contact surface area of the sample with the solvent.…”

Section: Resultsmentioning

confidence: 99%

Enhancing recovery of bioactive compounds from Cosmos caudatus leaves via ultrasonic extraction

Latiff

Ong

Rashid

et al. 2021

Sci Rep

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Cosmos caudatus (C. caudatus) is a medicinal plant that is high in bioactive compounds such as phenolics. In this study, an ultrasound extraction method was used to optimise the extraction of bioactive compounds from C. caudatus leaves. Response surface methodology (RSM) based on a Box-Behnken design (BBD) was applied to obtain the optimum extraction parameters which is solid–liquid ratio (10–30 g/mL), particle size (180–850 µm) and extraction time (20–30 min) for maximal quercitrin and total phenolic content (TPC) yields. Analysis of antimicrobial activity was performed against two human pathogenic microbes: Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) by the agar well diffusion method. The optimal ultrasonic extraction condition was as follow: solvent-liquid ratio of 1:28 (g/mL), particle size of 485 µm, and duration of 30 min, respectively. Remarkably, extraction using ultrasonic method had recovered more bioactive content and antioxidant activity than the Soxhlet method. The extract also exhibited good antimicrobial activities. Due to the above findings, the ultrasonic extraction was found to be suitable to improve recovery extraction of quercitrin and TPC from C. caudatus leaves. It also opens the possibility that the plant extract can be used for functional food and antimicrobial agents in various applications.

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“…At the end of the experiment, the cosolvent was also removed by evaporation in a rotary evaporator until dryness. More details about the SFE unit may be found elsewhere (Rodrigues et al., 2018; de Melo et al., 2020).…”

Section: Methodsmentioning

confidence: 99%

Design of volatile organic compounds profiles of roasted Coffea arabica extracts produced by supercritical and conventional solvents

Toledo

Melo

Rodrigues

et al. 2022

Int J of Food Sci Tech

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Summary This work addresses the potential of supercritical fluid extraction (SFE) to design volatile organic compounds (VOCs) profiles using roasted Coffea arabica. On the whole, 57 VOCs were identified by HS‐SPME/GC–MS. A full factorial design was adopted to study the effect of pressure (180 and 300 bar), temperature (40 and 80 °C) and ethanol content (0 and 5 wt.%). The total extraction yield ranged from 1.4 wt.% to 9.8 wt.%. At 180 bar and 80 °C, two extracts exhibited VOCs amount up to 3.5 times higher than the dichloromethane extract. Temperature and pressure favoured VOCs amount and total yield in conflicting ways, and ethanol had a negligible effect on VOCs amount. At 180 bar and 80 °C, the VOCs profile revealed a reinforcement of pyrroles, phenols, cyclopentenes and pyrans, at the expense of pyridines, carboxylic acids and furans. Hence, this essay evidences the potential of SFE to engineer coffee VOCs profiles.

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Supercritical CO2 extraction of V. vinifera leaves: Influence of cosolvents and particle size on removal kinetics and selectivity to target compounds

Cited by 28 publications

References 46 publications

Valorization of Tomato Residues by Supercritical Fluid Extraction

Valorization of Tomato Residues by Supercritical Fluid Extraction

Enhancing recovery of bioactive compounds from Cosmos caudatus leaves via ultrasonic extraction

Design of volatile organic compounds profiles of roasted Coffea arabica extracts produced by supercritical and conventional solvents

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