Effects of refining process on sunflower oil minor components: a review

Gotor, Alicia Ayerdi; Rhazi, Larbi

doi:10.1051/ocl/2016007

Cited by 39 publications

(36 citation statements)

References 58 publications

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“…Fig 5 showed total and individual tocopherol contents of different rapeseed oil varieties at each step of refining process. The results have shown that γ-tocopherol is the most abundant tocopherol with the concentration from 217.39 μg/g (Fengyou 5103) to 291.32 μg/g (Zhongyou 6766) in crude oils, followed by α-tocopherol, from 89.26 μg/g (Zhongyou 6766) to 125.18μg/g (Fengyou 5103) A significant gradual degradation in tocopherol content was observed during each step of refining process, which was consistent with previous studies [30].…”

Section: Resultssupporting

confidence: 91%

The effect of refining process on the physicochemical properties and micronutrients of rapeseed oils

Zhou

Wang

et al. 2019

PLoS ONE

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Information on the physicochemical variability in rapeseed oil from different varieties during each refining process is lacking. Our purpose was to investigate the physicochemical properties, micronutrients and oxidative stability of the oil extracted from the five varieties of rapeseeds during their different stages of refining process. Increase in the acid value, peroxide value and p -anisidine value were detected in the refining, while content of tocopherols, sterols, β-carotene and phenols, which are regarded as important nutritional compounds diminished. Moreover, the loss rate of total phytosterols of all oils during neutralization (9.23–7.3%) and deodorization (9.97–8.27%) were higher than that of degumming (3.01–0.87%) and bleaching (2.75–1.18%). Deodorization affected total tocopherols contents the most, followed by bleaching, neutralization and degumming. There was a remarkable reduction in total content of phenol, β-carotene and oxygen radical absorbance of all oils during refining. The accumulated information can be used in looking for the optimum condition to meet the basic requirements for oil and minimize micronutrients losses so as to increase their market value.

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Section: Resultssupporting

confidence: 91%

The effect of refining process on the physicochemical properties and micronutrients of rapeseed oils

Zhou

Wang

et al. 2019

PLoS ONE

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“…In general, cold-pressed oils contain better nutritional value than commercially refined oils because the chemical and thermal treatments in the refining process such as solvent extraction, degumming, neutralizing with NaOH, bleaching, dewaxing and deodorizing can cause degradation and reduction of some essential compounds as a consequence [ 3 ]. For instance, sunflower oil could lose up to 60% phytosterols, up to 55% tocols and up to 60% squalene due to the refining procedure as reported in a study by Gotor and Rhazi [ 4 ]. Refining process could increase the acid value, peroxide value and p -anisidine value in rapeseed oil, together with the diminished content of tocopherols, sterols, β-carotene and phenols as previously evidenced [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

GC-MS and HPLC-DAD analysis of fatty acid profile and functional phytochemicals in fifty cold-pressed plant oils in Thailand

Yuenyong

Pokkanta

Phuangsaijai

et al. 2021

Heliyon

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Cold-pressed oil is one of the healthiest plant extracts, but its use is limited only in some kinds of plants. Therefore, we aimed to investigate some potential cold-pressed oils with attractive fatty acid profiles and high amounts of functional phytochemicals. Fifty cold-pressed plant oils were prepared from various plant materials in Thailand, in which some of them were from uncommon or unattended plant materials. The oils included were nut oils (n = 9), pseudo-cereal oils (n = 9), legume oils (n = 3), amaranth oils (n = 3), marrow seed oils (n = 8), cruciferous seed oils (n = 7), and leafy green seed oils (n = 11). Gas-chromatography mass-spectrometry (GC-MS) and high-performance liquid chromatography coupled with a diode array detector (HPLC-DAD) were employed to analyze fatty acid profile and five functional phytochemicals (e.g., phytosterols, cholecalciferol, and squalene). Saturated fatty acids were detected around 7.87–36.04%, monounsaturated fatty acids 10.17–80.25%, and polyunsaturated fatty acids nondetectable (ND)–78.25%, phytosterols 663–15123 μg g −1 , squalene 265–5979 μg g −1 , and cholecalciferol ND–1287.75 μg g −1 . The study showed chemical characteristic of the analyzed oils: some contained good fatty acid composition and some were rich in functional phytochemical content. Among the obtained oils, marrow seed oils are a good source of phytosterol, cholecalciferol, and linoleic acid. Pseudo-cereal oils are rich in squalene and linolenic acid. Legume oils are rich in phytosterols and oleic acid. Besides, principal component analysis (PCA) was applied to identify the significance of oils that share compositional similarity (e.g., the samples from pseudo-cereal oil were found on the lower side of the PCA space, which separated them from marrow and leafy green seed oils distributed on the upper part of the plot). In summary, the qualitative and quantitative data would provide a good foundation for further application or selection of those plant oils for health purposes.

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“…Chemical stability depends on the chemical constituents of the oil, like antioxidants and oxidizable components [ 23 ]. Sunflower oil is usually subjected to a refining process that involves the complete loss of valuable active components with interesting nutritional-, health- and antioxidant-related characteristics [ 24 ]. Although synthetic antioxidants initially have been used with the purpose of retarding the oxidative deterioration, their implications in some diseases, such as cancer and carcinogenesis, are still controversial [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Stability of Enriched Oil with Phenolic Extract from Olive Mill Wastewaters

Romeo

Bruno

Imeneo

et al. 2020

Foods

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The disposal of olive mill wastewaters is a considerable subject for the development of a sustainable olive oil industry considering their high content of pollutants. Nevertheless, the selective extraction of phenolic compounds from olive mill wastewaters represents a promising approach to obtain phenolics suitable for food enrichment. This work aimed to evaluate the efficiency of phenolic extract addition (50 mg L−1), used as natural antioxidant, in sunflower oil against oxidative deterioration; to this aim, XAD-7-HP resin was tested in the recovery of phenolic compounds from olive mill wastewaters. Ultra-high performance liquid chromatography was used to evaluate the single phenols contained in the extract; the most consistent amount was detected for hydroxytyrosol (834 mg 100 mL−1). The change in the oxidation state of fortified sunflower oil was studied by measuring physicochemical (refractive index, peroxide value and oxidative resistance to degradation) and antioxidant parameters (DPPH, ABTS and ORAC assays) during 90 days of storage. Results showed an enhancement of oxidative stability of 50% in the fortified oil compared to control.

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Effects of refining process on sunflower oil minor components: a review

Cited by 39 publications

References 58 publications

The effect of refining process on the physicochemical properties and micronutrients of rapeseed oils

The effect of refining process on the physicochemical properties and micronutrients of rapeseed oils

GC-MS and HPLC-DAD analysis of fatty acid profile and functional phytochemicals in fifty cold-pressed plant oils in Thailand

Impact of Stability of Enriched Oil with Phenolic Extract from Olive Mill Wastewaters

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