Supercritical Fluid Extraction of Compounds from Spices and Herbs

Coelho, José Augusto Paixão; Palavra, A. M. F.

doi:10.1007/978-3-319-10611-3_10

Cited by 10 publications

(4 citation statements)

References 123 publications

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“…Density decreases with temperature causing the decreasing in solubility. Vapor pressure increases with temperature, thus increasing the solubility in the same time [30,39]. Pressure at the point of inversion of those two variables is known as crossover pressure or crossover point [30].…”

Section: Carboxylic Acid -Key Role In Life Sciencesmentioning

confidence: 99%

Isolation and GC Analysis of Fatty Acids: Study Case of Stinging Nettle Leaves

Đurović¹,

Šorgić²,

Popov³

et al. 2018

Carboxylic Acid - Key Role in Life Sciences

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Urtica dioica L. is perennial plant with remarkable medical properties and has been widely used in folk medicine and as a food. Fatty acids presented in its leaves were extracted applying three different techniques: classic, automated Soxhlet, and supercritical fluid extraction (SFE). SFE was performed at three different pressures (100, 200, and 300 bar) and two different temperatures (40 and 60°C). Obtained extract was analyzed using GC-FID analytical technique in order to obtain fatty acid profile samples. The highest yield was obtained in the case of automated Soxhlet extraction (218.907 mg/g), while the lowest was observed in the case of classic extraction (15.031 mg/g). Soxhlet approach provided the highest yield of saturated fatty acids (173.348 mg/g), while supercritical fluid extraction gave better results in the case of unsaturated fatty acids (60.062 mg/g). Deeper analysis of SFE extracts revealed relationship between extraction parameters (temperature and pressure) and yields of fatty acids where lower pressure ensured higher yield of unsaturated while higher pressure gave higher yield of saturated acids. On the other hand, increasing in temperature at isobaric conditions negatively influenced the yield of fatty acids except in the case of 300 bar where yield was higher at 60°C.

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Section: Carboxylic Acid -Key Role In Life Sciencesmentioning

confidence: 99%

Isolation and GC Analysis of Fatty Acids: Study Case of Stinging Nettle Leaves

Đurović¹,

Šorgić²,

Popov³

et al. 2018

Carboxylic Acid - Key Role in Life Sciences

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“…The extraction of the various bioactive compounds with beneficial properties is often performed with conventional extraction techniques that are generally based on the use of various solvents, such as ethanol, methanol, hexane, etc., using heating or mixing. The conventional extraction techniques have several disadvantages including long extraction times, the need for expensive purity solvents, low selectivity, evaporation of significant amounts of solvents, and potential decomposition of thermolabile compounds [ 22 , 23 ]. These problems can be solved by using other extraction techniques, such as green techniques.…”

Section: Introductionmentioning

confidence: 99%

Basil (Ocimum basilicum L.) Leaves as a Source of Bioactive Compounds

Romano

Luca

Aiello

et al. 2022

Foods

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Basil (Ocimum basilicum L.) is an annual spicy plant generally utilized as a flavouring agent for food. Basil leaves also have pharmaceutical properties due to the presence of polyphenols, phenolic acids, and flavonoids. In this work, carbon dioxide was employed to extract bioactive compounds from basil leaves. Extraction with supercritical CO2 (p = 30 MPa; T = 50 °C) for 2 h using 10% ethanol as a cosolvent was the most efficient method, with a yield similar to that of the control (100% ethanol) and was applied to two basil cultivars: “Italiano Classico” and “Genovese”. Antioxidant activity, phenolic acid content, and volatile organic compounds were determined in the extracts obtained by this method. In both cultivars, the supercritical CO2 extracts showed antiradical activity (ABTS●+ assay), caffeic acid (1.69–1.92 mg/g), linalool (35–27%), and bergamotene (11–14%) contents significantly higher than those of the control. The polyphenol content and antiradical activity measured by the three assays were higher in the “Genovese” cultivar than in the “Italiano Classico” cultivar, while the linalool content was higher (35.08%) in the “Italiano Classico” cultivar. Supercritical CO2 not only allowed us to obtain extracts rich in bioactive compounds in an environmentally friendly way but also reduced ethanol consumption.

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“…supercritical carbon dioxide, scCO2 [13][14][15][16][17][18][19][20][21][22][23][24]. The scCO2 because of its gas-like viscosity and diffusivity, and liquid-like density and solvating power [25][26][27][28][29], is endorsed and commonly now accepted as an industrial solvent, particularly when the targets are thermolabile high value-added products.…”

Section: Introductionmentioning

confidence: 99%