2007,40(6):1242-1247 Scientia Agricultura Sinica 1 210037 2 712100 3 510641 4 750006 Study on the Solubility of Kiwi Fruit Seed Oil in Supercritical Carbon Dioxide WU Cai-e 1,2, XU Ke-yong 3, LI Yuan-rui 2, LI Ting-ting 1, LI Wei-xing 4 ( 1 College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037; 2 College of Food Science and Engineering, Northwest University, Yangling 712100; 3 College of Light Industry and Food Sciences, South China University of Science and Technology, Guangzhou 510641 4 Oil Production Plant No.3 of Changqing Oil Field Branch, Yinchuan 750006) Abstract: Objective The extracting of kiwi fruit seed oil in supercritical carbon dioxidesc-co 2 and enriching α- linolenic acid from it further depends on the study of solubility of it in SC-CO 2.MethodUsing the method of the dynamic phase equilibria, the paper studied the variation regulations of the kiwi fruit s seed oil solubility of in SC-CO 2. ResultTemperature increasing, and above this pressure the solubility increases with temperature risesthe solubility of kiwi fruit seed oil in SC-CO 2 were 8.9-11.2 g kg -1 CO 2 at pressure of 30 MPa -35 MPa and temperature of 40; the optimal extractive conditions are 30 MPa-35 MPa, 40, and water content of the raw material is 5%-7%. ConclusionThe solubility of kiwi fruit seed oil in supercritical CO 2 is studied by the method of the dynamic phase equilibriaand it can provide references for the extracting of kiwi fruit seed oil and enriching it further. Key words: Kiwi fruit seed oil; Supercritical CO 2 ; Solubility; α- linolenic acid Actinidia chinensis Planch. ActinidiaceaeActinidia Lindl. 23.5%28.85% α- 63.99% [1] α- [2] α- EPADHA ω-3 2005-01-212007-02-08 2001608 1963-E-mailsxwucaie@163.com 1942-Tel029-87092757E-maillyr628@sohu.com
6 1243 [3] α- CO 2 [4] [510] [11, 12] CO 2 [13] CO 2 [14] [15] CO 2 CO 2 [16] CO 2 [17] CO 2 [18] [19] Rodrigues [20] CO 2 CO 2 CO 2 CO 2 CO 2 99.99% FW100 1 1 000 ml CO 2 D07-12AM/ZM D08-8BM/ZM 1% 1. CO 2 2. CO 2 3. 4. 5. 6. 7. 8. 9. 10. 1. CO 2 cylinder; 2. CO 2 pump; 3. Non-return valve; 4. Preheater; 5. Equilibrium column; 6. Sampling valve; 7. Test tube; 8. Ice water bath; 9. Buffer pot; 10. Flow meter Fig. 1 Schematic diagram of experimental apparatus used for dynamic phase equilibrium 2025 3035 MPa 354045 2.6 % 4.08%5.6%6.0%7.67%9.23% 100 g 30 0.09 MPa CO 2 0.09 MPa CO 2 CO 2 CO 2 2 h CO 2 CO 2
1244 40 CO 2 2 h CO 2 CO 2 [18] CO 2 1.02.0 L min -1 CO 2 100 L α- DPS Duncan s SSR 40 Fig. 3 Effect of pressure on the yield of kiwi fruit seed oil (40 24 CO 2 35 MPa30 MPa 25 MPa20 MPa 24 CO 2 CO 2 45 Fig. 4 Effect of pressure on the yield of kiwi fruit seed oil (45 [18] [19] CO 2 3 35 Fig. 2 Effect of pressure on the yield of kiwi fruit seed oil (35 CO 2 CO 2 CO 2 CO 2
6 1245 CO 2 CO 2, R 2 0.99 CO 2 CO 2 1 CO 2 Table Solubility of kiwi fruit seed oil in supercritical carbon dioxide (g kg -1 CO 2 ) Temperature () Pressure (MPa) 35 40 45 Average 35 10.4 11.1 11.2 10.900 A 30 8.5 8.9 9.2 8.867 B 25 6.8 6.1 5.7 6.200 C 20 4.2 3.8 3.5 3.833 D 0.01Different capital letters are significant at 0.01 level 20253035 MPa P0.01 P0.05 5 Fig. 5 Solubility of kiwi fruit seed oil in supercritical carbon dioxide 27.8 MPa CO 2 CO 2 CO 2 5 CO 2 CO 2 CO 2 6 5.6%6% CO 2 4% 7.67% CO 2 CO 2 CO 2
1246 40 CO 2 CO 2 5%7% CO 2 CO 2 [13] [14] [17] [18] Fig. 6 Effect of water content on solubility of kiwi fruit seed oil 23.5%28.85% 63.99% [1] CO 2 1.47% 6.41% 15.07% 15.23% 61.82% [16] CO 2 19.7 MPa 26.8 MPa 40 2.99 g L -1 3.82 g L -1 20.7MPa 27.6MPa 40 13.84 g L -1 18.99 g L -1 17.81 g L -1 23.52 g L -1 40 20 MPa25 MPa 30 MPa 3.8 g L -1 6.1 g L -1 8.9 g L -1 CO 2 CO 2 27.8 MPa 27.8 MPa 27.8 MPa 30 MPa 354045 CO 2 30 MPa 40 45 CO 2 8.9 g kg -1 9.2 g kg -1 CO 2 35 MPa 40 45 11.1 g kg -1 11.2 g kg -1 30 MPa 35 MPa 40 45 CO 2 3035 MPa 40 CO 2 5%7% CO 2 CO 2
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