A Review on Supercritical Fluid Extraction as New Analytical Method

Abbas, K. A.; Mohamed, Ashgar Ali Ali; Abdulamir, Ahmed Sahib; Abas, H. A.

doi:10.3844/ajbbsp.2008.345.353

Cited by 101 publications

(22 citation statements)

References 19 publications

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“…1a). Similarly, this collapse does not occur with supercritical fluid drying due to the absence of the liquid-gas interface (Abbas et al 2008). On the other hand, during oven drying, the capillary hydrostatic stress due to the surface tension of the receding water menisci causes a collapse of the structure (Fig.…”

Section: Resultsmentioning

confidence: 98%

Role of the Drying Technique on the Low-Acyl Gellan Gum Gel Structure: Molecular and Macroscopic Investigations

Cassanelli

Prosapio

Norton

et al. 2018

Food Bioprocess Technol

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The effect of three drying processes (freeze, oven and supercritical CO 2 drying) on CP Kelco low-acyl gellan gum gel was investigated, highlighting the role of the water removal mechanism (i.e. sublimation, evaporation and solvent replacement/extraction) and the process parameters on the gel structure, rather than focusing on the drying kinetics. It is the first time that a research paper not only compares the drying methods but also discusses and investigates how the molecular and macroscopic levels of gellan gum are affected during drying. Specifically, the dried gel structures were characterised by bulk density and shrinkage analyses as well as scanning electron microscope (SEM) and micro-computed tomography (μCT) microscopy. Micro-differential scanning calorimetry (μDSC) was used in a novel way to investigate the effect of the drying technique on the polymer disorder chains by partial melting of the gel. The resulting water uptake during rehydration was influenced by the obtained dried structure and, therefore, by the employed drying process. It was found that freeze-dried (FD) structures had a fast rehydration rate, while both oven-dried (OD) and supercritical CO 2 -dried (scCO 2 D) structures were slower. After 30 min, FD samples achieved a normalised moisture content (NMC) around 0.83, whereas OD and scCO 2 D samples around 0.33 and 0.19, respectively. In this context, depending on the role of the specific hydrocolloid in food (i.e. gelling agent, thickener, carrier), one particular dried-gel structure could be more appropriate than another. Graphical abstract From left to right: unprocessed hydrogels; μ-CT images of dried gels and unprocessed hydrogel; DSC curves after drying process

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Section: Resultsmentioning

confidence: 98%

Role of the Drying Technique on the Low-Acyl Gellan Gum Gel Structure: Molecular and Macroscopic Investigations

Cassanelli

Prosapio

Norton

et al. 2018

Food Bioprocess Technol

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“…Extraction time, in fact, decides the amount of supercritical CO 2 available for the extraction process. In case the available supercritical CO 2 is a limiting factor, the completeness of extraction is adversely affected 47 . However, the increase in time period beyond a point where the available supercritical CO 2 suffices the completeness of extraction could lead to detrimental effect because of other controlling parameters like temperature.…”

Section: Resultsmentioning

confidence: 99%

Supercritical fluid extraction of β-carotene from ripe bitter melon pericarp

Patel

Kar

Dash

et al. 2019

Sci Rep

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Study ascertained the recovery of β-carotene from enzyme-treated (enzyme load of 167 U/g) pericarp of ripe bitter melon using supercritical fluid extraction (SFE) technique. Effect of different pressure (ranged from 150–450 bar), carbon dioxide (CO2) flow rates (ranged from 15 to 55 ml/min), temperatures (from 50 to 90 °C), and extraction periods (from 45–225 minutes) were observed on the extraction efficiency of β-carotene. Results showed that extraction pressure (X1) among extraction parameters had the most significant (p < 0.05) effect on extraction efficiency of the β-carotene followed by allowed extraction time (X4), CO2 flow rate (X2) and the temperature of the extraction (X3). The maximum yield of 90.12% of β-carotene from lyophilized enzymatic pretreated ripe bitter melon pericarp was achieved at the pressure of approx. 390 bar, flow rate of 35 mL/min, temperature at 70 °C and extraction time of 190 min, respectively. Based on the accelerated storage study the 70% retention shelf life of the β-carotene into extract was estimated up to 2.27 months at 10 °C and up to 3.21 months at 5 °C.

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“…Therefore, SC-CO 2 could be considered a promising technique for the extraction of vegetable matrix oils without inducing degradation [79,80]. Thanks to the high diffusion capacity and high solvating power of CO 2 , SC-CO 2 is considered the most efficient method for the extraction of compounds from plant matrices and the most commonly used solvent in SFE [81,82]. In addition, differences in CO 2 solubility can be adjusted by controlling factors such as pressure and temperature.…”

Section: Supercritical Fluid Extraction (Sfe)mentioning

confidence: 99%

Date Seeds: A Promising Source of Oil with Functional Properties

Mrabet

Jiménez-Araujo

Guillén

et al. 2020

Foods

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The cultivation of the date palm (Phoenix dactylifera L.) is the main activity and source of livelihood for people from arid and semiarid regions of the world. Date production is increasing every year. In addition, pitted date exportation is rising and great amounts of date seeds are produced. This biomass represents a problem for manufacturing companies. At the moment, date seeds are normally discarded or used as animal feed ingredients. However, this co-product can be used for many other applications due to its valuable chemical composition. Oil is one of the most interesting components of the date seed. In fact, date seeds contain 5–13% oil. Date seed oil contains saturated and unsaturated fatty acids with lauric and oleic as the main ones, respectively. Tocopherols, tocotrienols, phytosterols, and phenolic compounds are also present in significant amounts. These phytochemicals confer added value to date seed oil, which could be used for many applications, such as food product formulations, cosmetics, and pharmaceuticals. This review provides up-to-date data on the different extraction techniques and the chemical composition of date seed oils. The applications of date seed oil have also been reviewed.

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A Review on Supercritical Fluid Extraction as New Analytical Method

Cited by 101 publications

References 19 publications

Role of the Drying Technique on the Low-Acyl Gellan Gum Gel Structure: Molecular and Macroscopic Investigations

Role of the Drying Technique on the Low-Acyl Gellan Gum Gel Structure: Molecular and Macroscopic Investigations

Supercritical fluid extraction of β-carotene from ripe bitter melon pericarp

Date Seeds: A Promising Source of Oil with Functional Properties

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