关键词: 臭氧氧化, 可食膜, 榴莲臭味, 电子鼻, PLS模型

Abstract: To eliminate the odor of durian pulp, the methods of ozone oxidation, edible film masking and their binding method are applied, and the effects of the treatments are detected by E-nose PEN3. The signal curves of the durian samples reach steady much faster after the treatments of punching 0 hole, 8 holes and 16 holes. The result of Principal Component Analysis (PCA) shows that there are much significant differences between the response values of these three treatments. A model of detecting the relative content of the durian pulp odor is established by Partial Least-Squares (PLS), and it turns out to be that the correlation coefficient of the PLS linear fitting curve established on the basis of the relative content of durian pulp odor is 0.997, and that the average relative error between the relative content of the samples punched 16 holes is under 10%. It shows that it is feasible to detect the relative content of durian pulp odor accurately by E-nose. The results show that the effect of the stearic acid membrane is the best when there are 2.70g stearic acid, 45.00g glycerinum and 90.00g SPI in one liter mixed liquor. The order of the effects on eliminating durian pulp odor of three methods is ozone oxidation with the addition of edible film masking﹥edible film masking﹥ozone oxidation.

Key words: ozone oxidation, edible film, durian odor, E-nose, PLS model