Effect of Subcritical Carbon Dioxide Extraction and Bran Stabilization Methods on Rice Bran Oil

Chia, Suet Lin; Boo, Huey Chern; Muhamad, Kharidah; Sulaiman, Rabiha; Umanan, Fizreena; Chong, Gun Hean

doi:10.1007/s11746-015-2596-5

Cited by 32 publications

(19 citation statements)

References 42 publications

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“…Results indicated the tocol composition of avocado oil was significantly affected ( p < 0.05) by extraction methods, whereby the contents of α‐ and γ‐tocopherols of SCO 2 ‐extracted oil were two to four times greater than solvent‐ and UAAE‐extracted oils, respectively. The superiority of SCO 2 in extracting the tocol components from plant materials was reported by Chia et al, in which their study demonstrated the tocols content of SCO 2 ‐extracted rice bran oil was ten times greater than solvent‐extracted rice bran oil. Low level of tocopherols content in UAAE‐extracted oil may be the poor solubility of non‐polar tocopherols in a polar solvent (e.g., water).…”

Section: Resultsmentioning

confidence: 74%

“…Previous studies indicated that solvents, temperatures, and time used in oil manufacturing process can significantly affect the qualities, bioactive phytochemicals, volatile components, and antioxidant capacities of plant oils . There is an increased interest in the development of oil extraction technologies that preserve the nutritional characteristics of virgin avocado oil.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Virgin Avocado Oil Obtained via Advanced Green Techniques

Tan

Chong

Hamzah

et al. 2018

Euro J Lipid Sci & Tech

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The quality characteristics, bioactive phytochemicals, volatile compounds, and antioxidant capacities of virgin avocado oil extracted using a couple of green methods, namely, subcritical CO2 extraction (SCO2) and ultrasound‐assisted aqueous extraction (UAAE), are compared with the oil extracted using the conventional solvent extraction. Results indicate the quality properties of avocado oil are unaffected by extraction methods. The total phenolic content of avocado oil is in the range of 111.27–130.17 mg GAE/100 g and the major phytosterol is β‐sitosterol (1.91–2.47 g kg−1). Avocado oil extracted using SCO2 exhibits two to four times greater levels of α‐ and γ‐tocopherols than solvent extraction and UAAE. The volatile components associated with nutty and grassy flavors are only detected in avocado oil extracted under low‐temperature extraction conditions such as SCO2 and UAAE. Based on the antioxidant capacity tests, avocado oil obtained by SCO2 exhibits the strongest antioxidant capacity compared with solvent extraction and UAAE. Practical Applications: Virgin avocado oil extracted using subcritical CO2 method exhibits superior levels of tocopherols content and antioxidant capacity than ultrasound‐assisted aqueous and conventional solvent methods. Subcritical CO2 is a promising oil extraction technique to obtain solvent‐free avocado oil with potential uses in functional foods and health care products. Virgin avocado oil is extracted using subcritical CO2 and ultrasound‐assisted aqueous techniques. The properties of the oil are compared with conventional solvent‐extracted oil. The percentage of antioxidant activity decreases in the order of SCO2‐extracted oil > solvent‐extracted oil > UAAE‐extracted oil.

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Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Characterization of Virgin Avocado Oil Obtained via Advanced Green Techniques

Tan

Chong

Hamzah

et al. 2018

Euro J Lipid Sci & Tech

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“…A schematic diagram of the subCO 2 soxhlet extraction process used in this study is shown in Figure as described by Chia et al (). In this process, the liquid CO 2 collected from the condenser flowed into the vessel to start the extraction.…”

Section: Methodsmentioning

confidence: 99%

Extraction of α-glucosidase inhibitory compounds fromPhaleria macrocarpafruit flesh using solvent, sonication, and subcritical carbon dioxide soxhlet methods

et al. 2017

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The objective of this study was to compare α‐glucosidase inhibitory activity of Phaleria macrocarpa extracts using subcritical carbon dioxide (subCO2) soxhlet extraction method with sonication and solvent extraction methods. The extraction was performed by subCO2 soxlet using carbon dioxide and the conventional organic solvent‐based sonication using ethanol and water, solvent extraction using methanol, and n‐hexane solvents. The yields and α‐glucosidase inhibitory activity of the P. macrocarpa extracts were analyzed. The yields using sonication, solvent extraction, and subCO2 soxhlet extraction were approximately 10.2 ± 1.0 to 25.4 ± 0.6% and 0.9 ± 0.1 to 2.0 ± 1.0%. The IC50 value of subCO2 soxhlet, sonication, and solvent extraction methods were 4.35, 7.34, and 1.9 µg/mL, respectively. The α‐glucosidase inhibitory activity of P. macrocarpa extract using subCO2 soxhlet method was higher than the conventional sonication method and lower than the solvent extraction method. Overall, subCO2 soxhlet extraction of P. macrocarpa represents a promising method to produce organic solvent free and highly α‐glucosidase inhibitory compounds containing extracts. Practical applications This study compared the conventional and nonconventional extraction methods for separating bioactive compounds from P. macrocarpa. Plant extracts contain a large variety of bioactive compounds with many other constituents including pharmaceuticals that require separations, purifications, and fractionations for further processing. Pharmaceutical industries are always looking for green processing methods obtaining green products. Nonconventional methods are of great interest owing to their efficiency such as fast, organic‐residues‐free, low temperature processing, and cost‐effective compare to any conventional method. Moreover, nonconventional methods are technologically advanced and claimed to be green with innumerable applications. Bioactive compounds of P. macrocarpa extracted by nonconventional methods may retain the natural quality that is of organic residues free and can be further exploited for the pharmaceutical, cosmetic, functional foods, and neutraceuticals industries. The environmental issues and health concerns of society are also demanding the green technology in our daily life.

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“…Unlike supercritical CO 2 extraction, an oil extracted via subcritical CO 2 is usually lighter in colour and contains fewer waxes and resins. The mild temperature and pressure used in subcritical fluid extraction with CO 2 are able to retain most of the thermally sensitive bioactive components in the plant materials . In comparison to solvent extraction, the avocado oils extracted by subcritical CO 2 were found to have higher iodine values, but lower slip melting points, FFA contents and saponification values…”

Section: Avocado Oil Extraction Processesmentioning

confidence: 99%

Development of Methods Used in the Extraction of Avocado Oil

Satriana

Supardan

Arpi

et al. 2018

Euro J Lipid Sci & Tech

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Avocado oil contains high concentrations of unsaturated fatty acids and many health‐promoting beneficial compounds. The oil can be extracted by various methods. The interest in new technologies as well as the lack of efficiency of available techniques to extract avocado oil have led to continual research on developing new extraction techniques. Avocado oil can be extracted by physical, chemical, and biological methods. New techniques to extract avocado oil need to be developed to improve overall extraction yields and selectivity of bioactive components from avocado and to produce high‐quality avocado oil. This review presents up‐to‐date knowledge on the developments in extraction techniques as well as the refining, characterization, and utilization of avocado oil. Practical Applications: Avocado oil has many nutritional values with potential applications in the food, nutraceutical, and pharmaceutical industry. By considering the development of extraction process for avocado oil, as discussed in this review, many extraction techniques have been developed to gain an efficient process and produce high‐quality avocado oil. A typical avocado oil has high levels of unsaturated fatty acids and large amounts of health‐promoting, beneﬁcial compounds. Avocado oil can be extracted by various methods. Many new extraction methods are developed to improve overall extraction yields and selectivity of bioactive components from avocado and to produce high‐quality avocado oil.

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Effect of Subcritical Carbon Dioxide Extraction and Bran Stabilization Methods on Rice Bran Oil

Abstract: a promising method to produce premium-quality rice bran oil.

Cited by 32 publications

References 42 publications

Characterization of Virgin Avocado Oil Obtained via Advanced Green Techniques

Characterization of Virgin Avocado Oil Obtained via Advanced Green Techniques

Extraction of α-glucosidase inhibitory compounds fromPhaleria macrocarpafruit flesh using solvent, sonication, and subcritical carbon dioxide soxhlet methods

Development of Methods Used in the Extraction of Avocado Oil

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