| With “Linhai No.1” variety of Gardenia jasminoides as material, the reflux extraction technologies conditions of G. jasminoides peel and pulp oils were optimized by Box-Behnken design and response surface methodology, and the physicochemical property and fatty acid composition of the oils were studied. The results showed that the optimal extraction conditions of G. jasminoides peel oil were obtained as follows: extraction time 60 min, extraction temperature 75 ℃ and ratio of solid to liquid 1∶ 12, whereas the optimal extraction conditions of G. jasminoides pulp oil were obtained as follows: extraction time 60 min, extraction temperature 75 ℃ and ratio of solid to liquid 1∶ 10. Under the optimal conditions, the yields of G. jasminoides peel oil and G. jasminoides pulp oil were 2.35% and 20.4%, respectively.The physicochemical properties of G. jasminoides peel oil and G. jasminoides pulp oil were similar, and the peroxide values and acid values of the oils were relatively low, which met the requirements of Hygienic Standard for Edible Vegetable Oil. GC-MS analysis showed that the fatty acid profiles and contents of G. jasminoides peel oil and G. jasminoides pulp oil were different. The dominant fatty acids in G. jasminoides peel oil were linoleic acid (44.12%), palmitic acid (21.86%), eicosenoic aicd (10.46%), oleic acid (9.07%)and stearic acid(5.68%), while the main fatty acids in G. jasminoides pulp oil were linoleic acid (53.06%), oleic acid (2188%), palmitic acid (17.57%),stearic acid(3.85%)and tricosanoic acid(1.33%). |
