| In order to well understand the impact of processing procedure on the qualiy of Jatropha seed oil, Jatropha seed oils were extracted by leaching method and pressing method respectively, and compared from the aspects of fatty acid composition and physicochemical indexes. Besides, the quality change of Jatropha seed oil during refining was also investigated. The results indicated that Jatropha seed oils extracted by the two methods showed a significant difference in the physicochemical indexes, conversely showed no significant difference in fatty acid composition. Compared with the pressed oil, the leached oil presented higher acid value, iodine value, peroxide value, saponification value and phospholipids content. The main triacylglycerols in Jatropha seed oil were LOO(17.86%), LLO(16.02%)，POL(14.06%)，POO(7.14%)，LLP(6.58%)，OOO(6.44%) and StOL(6.38%). Furthermore, refining process had no significant effect on the main fatty acid composition of Jatropha seed oil, but the acid value, peroxide value, iodine value and saponification value decreased significantly after refining. |
