EVALUATION OF NANOCOMPOSITES PACKAGING CONTAINING ZnO ON SHELF LIFE OF FRESH NAGPUR MANDARIN (Citrus reticulata Blanco) JUICE

DINESH KUMAR¹*, LALLAN RAM², N. VIGNESHWARAN^3
1ICAR- Central Citrus Research Institute, Nagpur, 440033, Maharashtra, India
²Central Institute of Horticulture, Medziphema, 797106, Nagaland, India
³ICAR- Central Institute for Research on Cotton Technology (CIRCOT), Matunga, Mumbai, 400019, Maharashtra, India
* Corresponding Author : dineshscn@gmail.com

Received : 17-05-2018     Accepted : 27-05-2018     Published : 30-05-2018
Volume : 10     Issue : 10       Pages : 6116 - 6120
Int J Agr Sci 10.10 (2018):6116-6120

Keywords : ZnO embedded Nanopackaging, LDPE packaging, Zinc oxide nano particles, Nagpur mandarin, refrigerated storage, microbial stability
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to ICAR- Central Citrus Research Institute, Nagpur, 440033, Maharashtra, India
Author Contribution : All author equally contributed

The ZnO Nanocomposites film used in study was characterized by 40nm ZnO nanoparticle embedded in 60 µm thickness poly film with tensile strength of 3.35±0.50 kg longitudinally and 1.67±0.27 kg transversely average breaking load which was provided by CIRCOT, Mumbai. Quality parameters like total soluble solid, acidity, browning index, color value, ascorbic acid content, limonin, carotenoids, sugars and microbial load of nanocomposites and LDPE film packed Nagpur mandarin (Citrus reticulata Blanco) juice stored in refrigerated condition were evaluated at monthly interval. Microbial load recorded as 6 log CFU/ml till 90 days of storage, which was considered as below threshold population in the nano packaging, contain ZnO as nano material. The juice orange color (a/b ratio) was found to be slightly better in ZnO nano packaging (0.33) as compared to LDPE packaging (0.22) after 30 days storage. The juice acidity dwindles from 0.59-0.73% and 0.81% in ZnO nano packaging and LDPE packaging respectively after 30 days storage. Further, least degradation of ascorbic acid (26.95mg/100ml) was observed in ZnO nano packaging. None of juice packaging showed browning upto 90 days storage. Increased trend in limonin and carotene content of juice was observed after 30 days of storage which decreased later in both type of packaging. However, juice reducing sugar in nano ZnO composed packaging maintained their value beyond 30 days in refrigerated storage. Total sugar and non-reducing sugar showed decreasing and afterwards decreasing trend both in nanopackaging and LDPE packaging.

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