SUBCRITICAL FLUID EXTRACTION OF SESAME OIL AT LOW TEMPERATURE AND SESAME OIL QUALITY ANALYSIS

We optimized the sesame oil extraction process of white sesame seeds by using subcritical propane through single factor experiments and orthogonal experiments,and obtained the optimum extraction parameters as follows: temperature 50 ℃,extraction 6 times,extraction time 30 minutes, and material-to-liquid ratio 1:4. Under the optimum conditions, the unpeeled sesame oil yield reached 95.56%,and the pealed sesame oil yield reached 95.33%. All indicators of the unpeeled sesame oil and the peeled sesame oil,except water content and volatile matter content,were superior to the Chinese secondary sesame oil and the Chinese primary sesame oil respectively. The peeled sesame meal had good quality,and could keep proteins from denaturing; the NSI value reached 12.62;and the peeled sesame meal was superior to the Chinese primary sesame meal,except crude fatty content.