Effects of High Concentration Ozone Gas Fumigation on the Quality and Shelf-life of Longan Fruit

ABSTRACT The objective of this research was to study the effects of high concentration ozone (HCO) fumigation on the shelf-life of fresh longan. Longan was exposed to ozone gas at varying inlet concentrations of 4,000, 8,500, and 13,000 ppm with holding times of 5 and 15 min. Results showed that the longan exposed to ozone gas at 8,500 ppm for 5 min was considered a suitable treatment to extend shelf-life up to 35 days, which is 57% longer than the shelf-life of non-ozonated longan. The SEM revealed that the ozonated longan had less surface epidermal hairs than the non-ozonated longan.

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