Comparison of Various Packaging Films for Mango Export

This study compared the effects of the use of various types of packaging films in maintaining quality, preserving bioactive compounds and extending shelf life of the ‘Nam Dok Mai’ mango. The principal techniques for maintaining the quality of mangoes are based on modified atmosphere packaging using highly gas-permeable films and an ethylene-removing mechanism. The films studied were non-perforated highly gas-permeable film, non-perforated ethylene-absorbing highly gas-permeable film (HNPE), micro-perforated highly gas-permeable films (HMP) and common non-perforated polyethylene film (LNP). These films were compared with non-packaging treatment, which served as a control (C). Gas composition (O2, CO2 and C2H4) in the package headspace was monitored during storage at 12°C. The quality of mangoes were assessed by weight loss, colour (L* a* b*), texture, total soluble solids, titratable acidity, total phenolics, total flavonoids, ethanol concentration and sensory quality. Equilibrium-modified atmospheres of 5 kPaO2 + 5 kPaCO2 and 4 kPaO2 + 5 kPaCO2 were achieved in the non-perforated highly gas-permeable film and HNPE packs, respectively. Carbon dioxide accumulation was observed in the HMP and LNP packs where CO2 reached 17 and 10 kPa, respectively, after storage for 10 days. The shelf life of mangoes was extended to 40 days with HNPE, 35 days with HNP, and 30 days with HMP, as compared with 20 days with control and 5 days with LNP. HNPE, the film incorporated with fine particles of mordenite framework inverted-type zeolite with ethylene-absorbing ability, could further extend the shelf life of mangoes in addition to modified atmosphere packaging alone. Copyright © 2011 John Wiley & Sons, Ltd.

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