Toward determining fat quality parameters of fish oil by means of ¹H NMR spectroscopy

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• 作者：Editha Giese ; Ole Winkelmann ; Sascha Rohn and Jan Fritsche
• 刊名：European Journal of Lipid Science and Technology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：119
• 期：2
• 全文大小：774K
• ISSN：1438-9312

文摘

The consumption of fish oil-based dietary supplements has increased dramatically in recent years, which is mainly due to their high content of health promoting omega-3 fatty acids. However, these polyunsaturated fatty acids are extremely prone to oxidation. This study investigated the potential of ¹H NMR spectroscopy for the assessment of the oxidative deterioration of fish oils. Nine raw fish oils of different fish species were stored for 3 months at room temperature at different degrees of sunlight exposure as well as under standardized accelerated storage conditions for 6 days (at 40°C and under constant light exposure). Fish oil samples were analyzed by ¹H NMR spectroscopy as well as by traditional methods to determine the fat quality parameters peroxide value (PV), anisidine value (AnV), TOTOX value, and acid value (AV). PLS (partial least squares) regression models were used to predict these fat quality parameters based on the ¹H NMR spectra. The best regression models reached an R² of 0.949, 0.962, 0.991, and 0.977 for PV, AnV, TOTOX value, and AV, respectively. In conclusion, ¹H NMR spectroscopy is a promising approach for a fast, reliable, and sustainable assessment of fish oil quality with regard to lipid oxidation.