Application of Chrastil's model to the extraction in SC-CO2 of β-carotene and lutein in Mentha spicata L.

Gómez-Prieto, M. S.; Castillo, Marı́a Luisa Ruiz del; Flores, Gema; Santa-Marı́a, Guillermo E.; Blanch, Gracia Patricia

doi:10.1016/j.supflu.2007.05.010

Cited by 27 publications

(8 citation statements)

References 27 publications

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“…In this case a crossover pressure was demonstrated, indicating that at 40 MPa the extraction process was controlled by diffusion limitation, which limited the extraction rate. This result is in agreement with previous work,17, 18 where, at constant temperature, extraction yield and solubility of lutein increased with increasing pressure.…”

Section: Resultssupporting

confidence: 94%

Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Kitada

Machmudah

Sasaki

et al. 2008

J of Chemical Tech & Biotech

112

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BACKGROUND: Chlorella vulgaris is a green microalgae that contains various pigment components of carotenoids and chlorophylls. Supercritical CO 2 is widely used for extraction of pharmaceutical compounds because it is non-oxic and easily separated from extracted material by simply depressurizing. In this work, pharmaceutical compounds from Chlorella vulgaris have been extracted using supercritical CO 2 with or without entrainer at various extraction conditions.

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Section: Resultssupporting

confidence: 94%

Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Kitada

Machmudah

Sasaki

et al. 2008

J of Chemical Tech & Biotech

112

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“…It may be noted that for pressures above 6.0 MPa, all of the data are included in residuum values between ±0.1; whereas in the case of the data obtained for pressures under 6.0 MPa the error is higher, in agreement with the fact that the Chrastil equation does not function in the critical point neighborhood. This is in agreement with other authors, − who have reported that the model does not work well when the density of the solute is low, which happens at low pressures, close to the critical point.…”

Section: Discussionsupporting

confidence: 93%

Extraction of Kerogen from Oil Shale (Puertollano, Spain) with Supercritical Toluene and Methanol Mixtures

Torrente

Galán

2010

Ind. Eng. Chem. Res.

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The solubility of kerogen from Puertollano (Spain) oil shales in supercritical mixtures of toluene and methanol with 20, 40, 60, and 80 mol % methanol were studied in a range of temperatures and pressures of 603-623 K and 7.0-20.0 MPa, respectively. The bitumen obtained with each of the solvents and operation conditions was analyzed by gas chromatography coupled with a mass detector. The results indicate that the composition of the bitumen is dependent on the supercritical solvent and independent of the operation conditions. Solubility data were correlated with the Chrastil equation. This model correlates the experimental data properly when the conditions are distant from the critical point. From this equation, the solvation parameter k was found to be between 0.9 and 1.5 for different mixtures of toluene and methanol. Singular values of k were obtained for mixtures with 20 and 40 mol % methanol. This is probably due to a certain molecular aggregation between the toluene and methanol, perhaps an azeotrope, at those concentrations and operation conditions.

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“…Moreover, for lutein content, the use of co-solvent also emerged as an independently significant factor ( p < 0.05), ( Figure 1 A). These results may be due to a change in the solubility of lutein as a function of temperature and pressure [ 37 ]. Lutein production from Arthrospira has been previously reported [ 25 ], but its concentration had not been determined by quantification with analytical standards.…”

Section: Resultsmentioning

confidence: 99%

Effect of Supercritical Carbon Dioxide Extraction Parameters on the Biological Activities and Metabolites Present in Extracts from Arthrospira platensis

et al. 2017

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Arthrospira platensis was used to obtain functional extracts through supercritical carbon dioxide extraction (SFE-CO2). Pressure (P), temperature (T), co-solvent (CX), static extraction (SX), dispersant (Di) and dynamic extraction (DX) were evaluated as process parameters through a Plackett–Burman design. The maximum extract yield obtained was 7.48 ± 0.15% w/w. The maximum contents of bioactive metabolites in extracts were 0.69 ± 0.09 µg/g of riboflavin, 5.49 ± 0.10 µg/g of α-tocopherol, 524.46 ± 0.10 µg/g of β-carotene, 1.44 ± 0.10 µg/g of lutein and 32.11 ± 0.12 mg/g of fatty acids with 39.38% of palmitic acid, 20.63% of linoleic acid and 30.27% of γ-linolenic acid. A. platensis extracts had an antioxidant activity of 76.47 ± 0.71 µg GAE/g by Folin–Ciocalteu assay, 0.52 ± 0.02, 0.40 ± 0.01 and 1.47 ± 0.02 µmol TE/g by DPPH, FRAP and TEAC assays, respectively. These extracts showed antimicrobial activity against Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922 and Candida albicans ATCC 10231. Overall, co-solvent was the most significant factor for all measured effects (p < 0.05). Arthrospira platensis represents a sustainable source of bioactive compounds through SFE using the following extraction parameters P: 450 bar, CX: 11 g/min, SX: 15 min, DX: 25 min, T: 60 °C and Di: 35 g.

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Application of Chrastil's model to the extraction in SC-CO2 of β-carotene and lutein in Mentha spicata L.

Cited by 27 publications

References 27 publications

Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Extraction of Kerogen from Oil Shale (Puertollano, Spain) with Supercritical Toluene and Methanol Mixtures

Effect of Supercritical Carbon Dioxide Extraction Parameters on the Biological Activities and Metabolites Present in Extracts from Arthrospira platensis

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Application of Chrastil's model to the extraction in SC-CO2 of β-carotene and lutein in Mentha spicata L.

Cited by 27 publications

References 27 publications

Supercritical CO2 extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Supercritical CO2 extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Extraction of Kerogen from Oil Shale (Puertollano, Spain) with Supercritical Toluene and Methanol Mixtures

Effect of Supercritical Carbon Dioxide Extraction Parameters on the Biological Activities and Metabolites Present in Extracts from Arthrospira platensis

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Product

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Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris

Supercritical CO₂ extraction of pigment components with pharmaceutical importance from Chlorella vulgaris