Abstract:

In this study, ozone oxidation, edible film masking and their combination were applied to eliminate the odor of
durian pulp. The effects of these treatments were quantitatively detected by using electronic (E)-nose PEN3. Punching 0,
8 and 16 holes in the samples from three groups reduced respectively the exposed areas of durian pulp to form three odor
concentrations. The signal curves of the durian samples used to establish PLS model reached a steady level much faster.
The result of principal component analysis (PCA) showed that there were much significant differences between the response
values of these three treatments. A model for detecting the relative content of durian pulp odor was established by PLS, and
it turned out that the correlation coefficient of the PLS linear fitting curve established on the basis of the relative content of
durian pulp odor was 0.997, and that the average relative error for the relative content of the samples with 16 punched holes
was lower than 10%, proving that it is feasible to accurately detect the relative content of durian pulp odor by E-nose. The
results showed that stearic acid membrane made from 2.70 g of stearic acid, 45.00 g of glycerinum and 90.00 g of SPI in one
liter of the mixed liquor was the most effective in masking the odor. The combination of ozone oxidation and edible film
masking was the most effective way of eliminating durian pulp odor.

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