This study evaluated the effect of a MAP system with or without
an antioxidant dip treatment on the quality of fresh-cut ‘Kent’
mango slices stored at 5 or 15 °C. The MAP system used was
efficient in maintaining the targeted 3 to 4 kPa O2 concentration
during storage at 15 °C. However, 17 to 18 kPa CO2 developed
inside the packages, resulting in mango slices that were softer
than samples stored in air. The development of a new type of
polymeric film tailored to the required CO2/O2 selectivity of 8
would be necessary in order to enhance the positive effect of MAP
on fresh-cut mango when exposed to non-chilling temperatures.
Further research is also required to better define the anaerobic
compensation point for fresh-cut mangoes in a reduced O2 plus
elevated CO2 environment.
An antioxidant dip applied to ‘Kent’ fresh-cut mango slices
in combination with MAP resulted in better firmness and visual
quality and extended the shelf life of the product by 1 d at 15 °C
and by 2 d at 5 °C. The loss of characteristic mango aroma during
storage at 5 °C was most likely due to interaction between
the film and the aroma volatiles, while the plastic-like odor that
developed apparently came from the PVC film.
Consequently, it can be concluded that the PVC film applied
in this study is not suitable for use in a MAP system for mango
fruit. It is also apparent that proper handling at low temperature
(5 °C) remains the most critical practice for maintaining freshcut
mango quality.