Modified atmosphere packaging of guava fruits in polymeric films
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Date
2007
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Publisher
CCSHAU
Abstract
The study on modified atmosphere packaging of guava fruits was
undertaken to evaluate the effect of different types of polymeric film,
thickness, perforation level on the shelf life of guava fruits under
different storage environments. Guava fruits were packed in Low Density
Polyethylene (LDPE) and Polypropylene (PP) of 100 gauge (25 micron) and
150 gauge (37.5 micron) thickness each. LDPE and PP film of 100 and
150 gauge with 0.5% level of perforation were also used. The quality of
guava fruits was observed in terms of Physiological Loss in Weight,
firmness, Total Soluble Solids, oxygen and carbon dioxide concentration,
acidity and ascorbic acid. In all the treatments given, Physiological Loss
in Weight increased with storage duration where as fruit firmness and
ascorbic acid decreased with increasing storage period. O2 and CO2 ,
decreased and increased respectively with storage time. Based upon
above parameters, among perforated and non perforated LDPE 100 and
150 and PP 100 and 150 films, non perforated LDPE 150 was found to be
the best packaging film for extending shelf life of guava fruits upto 18
days at room temperature storage conditions and upto 24 days at low
temperature storage conditions with the minimum losses. A perforation
level of 0.5 percent was found to provide no significant benefit when
compared with the fruits packed in non-perforated film. The thickness of
the film had positive correlation with quality parameters. Film packaging
was found to result in reduction of losses over control fruits. During the
period of study non-perforated packages were found to give lesser
deterioration of quality as compared to the perforated ones and control
fruits. And among non-perforated packages, LDPE 150 was found to be
most effective in reducing the changes in quality parameters.