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Fish oil (FO) is susceptible to oxidation due to its high content of polyunsaturated fatty acids. This will shorten the quality guarantee period for the FO. Microencapsulation of the FO is an essential means to improve its stability. This study prepared microencapsulation using gelatin and gum Arabic as wall materials, FO as the core material, and grapefruit essential oil (GEO) as antioxidants. FO-GEO microcapsules were successfully obtained by using a complex coacervation method. Optical microscopy (OM), Fourier-transform infrared spectroscopy (FTIR), and thermal gravimetric analysis (TGA) were used to characterize the morphology, chemical structure, and thermal stability of the microcapsules. The influence of different concentrations of GEO on the FO stability in the microcapsules was investigated. The 2,2-diphenyl-1-picryl-hydrazyl（DPPH） radical scavenging assay and determination of the product's thiobarbituric acid (TBA) value decreased significantly depending on the GEO concentration. The results showed that adding GEO in microcapsules can protect FO oxidation.

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Effect of Grapefruit Essential Oil on the Oxidative Stability of Fish Oil Microcapsules

  • 会议论文

  • 发表日期：

    2025年

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  • Ran Mo,
  • Li An,
  • Jingjing Ren,
  • Wenfeng Xie,
  • Zhongxiao Li,
  • Yi Fang,
  • Zhicheng Sun

摘要

Fish oil (FO) is susceptible to oxidation due to its high content of polyunsaturated fatty acids. This will shorten the quality guarantee period for the FO. Microencapsulation of the FO is an essential means to improve its stability. This study prepared microencapsulation using gelatin and gum Arabic as wall materials, FO as the core material, and grapefruit essential oil (GEO) as antioxidants. FO-GEO microcapsules were successfully obtained by using a complex coacervation method. Optical microscopy (OM), Fourier-transform infrared spectroscopy (FTIR), and thermal gravimetric analysis (TGA) were used to characterize the morphology, chemical structure, and thermal stability of the microcapsules. The influence of different concentrations of GEO on the FO stability in the microcapsules was investigated. The 2,2-diphenyl-1-picryl-hydrazyl（DPPH） radical scavenging assay and determination of the product's thiobarbituric acid (TBA) value decreased significantly depending on the GEO concentration. The results showed that adding GEO in microcapsules can protect FO oxidation.