Abstract
The method of preserving dragon fruit with smart packaging films (improved in terms of water permeability and air permeability) to improve the microclimate in the packaging is evaluated as a suitable method for these condition facilities in Vietnam and gives the best efficiency. In this study, red flesh dragon fruit was packaged in antibacterial packaging film (LLDPE-G) made based on linear low-density polyethylene (LLDPE) combined with polyhexamethylene guanidine (PHMG). The objective of this study was to determine the effect of the ratio of LLDPE-G packaging film area/agricultural products’ mass (cm²/g), storage temperature (ºC) to oxygen and carbon dioxide balance in the package, and nutritional and sensory quality of red-flesh dragon fruit during storage. Experimental results showed that the packaging film area/fruit mass ratio is 2.00 cm²/g, and the appropriate storage temperature is 6ºC, corresponding to the equilibrium of the microclimate at 3.77% O2 gas concentration and 5.84% CO2concentration. After 20 days of storage, the natural weight loss reached 7.86%, the fruit still retained its characteristics (with index a 50.55), total soluble solids (TSS) reached 14.56oBrix, vitamin C content reached 9.72 mg/100 g. These indicators met the food hygiene and safety standards on microbiology according to regulations of good agricultural practices (GAP).
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