Original Paper

Journal of the American Oil Chemists' Society

, Volume 90, Issue 3, pp 349-357

Simplex-Centroid Mixture Design Applied to the Aqueous Enzymatic Extraction of Fatty Acid-Balanced Oil from Mixed Seeds

  • Yang LiAffiliated withCollege of Food Science, Northeast Agricultural UniversityNational Research Center of Soybean Engineering and Technology
  • , Yan ZhangAffiliated withCollege of Food Science, Northeast Agricultural UniversityNational Research Center of Soybean Engineering and Technology
  • , Mei WangAffiliated withCollege of Food Science, Northeast Agricultural UniversityNational Research Center of Soybean Engineering and Technology
  • , Lianzhou JiangAffiliated withCollege of Food Science, Northeast Agricultural UniversityNational Research Center of Soybean Engineering and Technology Email author 
  • , Xiaonan SuiAffiliated withCollege of Food Science, Northeast Agricultural UniversityNational Research Center of Soybean Engineering and Technology

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Abstract

A one-step method was developed to extract oil from a mixture of soybeans, peanuts, linseeds, and tea seeds using an aqueous enzymatic method. The proportion of the four seeds was targeted in accordance with a fatty acid ratio of 0.27 (SFA, saturated fatty acid(s)): 1 (MUFA, monounsaturated fatty acid(s)): 1 (PUFA, polyunsaturated fatty acid(s)), and the oil extraction yield was maximized by applying the simplex-centroid mixture design method. Three models were developed for describing the relationship between the proportion of the individual seeds in the mixture, the fatty acid ratio in the extracted oil, and the oil extraction yield, respectively. The developed models were then analyzed using an ANOVA and were found to fit the data quite well, with R 2 values of 0.98, 0.93, and 0.93, respectively. The three models were validated experimentally. The results indicated that the ratio of fatty acids in the oil ranged between 0.98 and 1.12 (MUFA:PUFA) and between 0.26 and 0.28 (SFA:MUFA), which were quite close to the target values of 1 and 0.27, respectively. The oil extraction yield of 62.13 % was slightly higher than the predicted value (60.32 %).

Keywords

Oil blend Aqueous enzymatic extraction Fatty acids Mixture design Mixed seeds