Food and Fermentation Industries >

2024 , Vol. 50 >Issue 22: 270 - 277

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.038100

Effect of different oil extraction methods on quality of flaxseed oil and protein extracted from flaxseed meal

  • GAN Shengrui ,
  • WANG Jinying ,
  • YANG Furong ,
  • DONG Guoxin ,
  • ZHAO Zhuo ,
  • QIAN Jiangchao
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  • (College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China)

Received date: 2023-11-28

  Revised date: 2024-01-27

  Online published: 2024-12-17

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Abstract

Flaxseed oil and flaxseed meal were obtained by different oil extraction methods including screw pressing, hydraulic pressing, and solvent extraction, and then the effects of different methods on the quality of flaxseed oil and protein were investigated.Results showed that different oil production processes had a significant impact on the physicochemical indicators of flaxseed oil (P<0.05), of which the highest acid value of screw pressing oil, 0.37 mg/g, while the hydraulic pressing group had the highest saponification value of 189.57 mg/g.The fatty acid composition and content were not significantly affected by the oil production process (P<0.05).A total of five fatty acids were detected, the content size in the order of linolenic acid, oleic acid, linoleic acid, palmitic acid, and stearic acid.The screw-pressing group had the smallest change in peroxide value in the oven experiment, and its oxidative stability was the best among the three groups of oil samples, whereas the hydraulic press group was the worst.The quality of the meal protein of the three groups was analyzed, and the results showed that different oil production processes affected the infrared spectral peak intensity of flaxseed meal protein and its ratio of β-sheet and β-turn to different degrees.The results found that the hydraulic press meal protein had the highest fluorescence intensity and the lowest solubility, foaming ability, and emulsification ability.Solvent extraction meal protein had the highest solubility, foaming ability, and emulsification ability.In summary, a suitable oil production process can be selected according to the actual needs.

Key words： flaxseed; flaxseed oil; oil production process; protein; quality analysis

Cite this article

GAN Shengrui , WANG Jinying , YANG Furong , DONG Guoxin , ZHAO Zhuo , QIAN Jiangchao . Effect of different oil extraction methods on quality of flaxseed oil and protein extracted from flaxseed meal[J]. Food and Fermentation Industries, 2024 , 50(22) : 270 -277 . DOI: 10.13995/j.cnki.11-1802/ts.038100

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