Shelf life enhancement of kinnow through active packaging
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Date
2021
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Punjab Agricultural University, Ludhiana
Abstract
Kinnow comes in “Mandarin” group of citrus fruits, which produced prominently in India and Pakistan and being perishable in nature. It has the shortest shelf life among all other citrus fruits. The present study was carried out to enhance the shelf life of kinnow by active packaging. RSM with BBD for 3 independent variables at 3 levels viz. dose of scavenger (35grams), fungicide concentration (3-7%) and polythene thickness (100-200guage) was used to optimize the process parameters to maintain the quality of fruit with respect to selected responses i.e., gas composition, physiological loss in weight, firmness, total soluble solids, titrable acidity, ascorbic acid, color difference, microbial load and shelf life. The samples treated with fungicide was packed in LDPE wrapped carton box with O2, CO2 and C2H4 scavenger and stored in cold chamber (5-7°C and 90-95% RH) and were monitored at regular intervals. It was observed that physiochemical properties of kinnow fruit were significantly affected by active packaging (p< 0.05). Optimization was done aiming at minimize O2, CO2, physiological loss in weight, total soluble solids, color difference, microbial load and maximize firmness, titrable acidity, ascorbic acid, shelf life while the process parameters should be within range. The optimized conditions for active packaging of kinnow fruit was 5 grams dose of scavenger, 6.83% fungicide concentration and 192.12 guage of polythene thickness. Corresponding to these variables, the values of O2, CO2, physiological loss in weight, firmness, total soluble solids, titrable acidity, ascorbic acid, color difference, microbial load and shelf life were 12.84%, 3.75%, 7.34%, 4.44 kgf, 9.2°Brix, 1.72%, 35.28 mg/100ml, 0.55, 4.87x103 cfu/ml and 69 days respectively. The overall desirability was 0.812. Value of percentage deviation for validation was less than 5% for all the responses which
indicating the precision and reliability of the study.
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Citation
Pawandeep Kaur (2021). Shelf life enhancement of kinnow through active packaging (Unpublished M.Tech. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.