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Shelf life enhancement and associated quality and sensory changes on refrigerated storage of tender coconut water subjected to non-thermal microfiltration and treated with additives

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Abstract

Evaluation of tender coconut water was done that was subjected to a nonthermal two stage microfiltration process that involved filtration through 0.8 µm and 0.45 µm pore size filters followed by addition of 200 mg/L citric acid, 180 mg/L ascorbic acid, orange honey at 5% (w/v) followed by packaging in glass bottles with headspace flushed with nitrogen. The effect of storage under refrigeration was studied. Microfiltration reduced the total simple sugars, protein and reducing sugars respectively by 13.4, 13.0 and 21.5% without significantly affecting the overall acceptability. Microfiltered samples did not show any signs of haemolytic activity. Addition of citric acid, ascorbic acid and honey was able to reduce activity of polyphenol oxidase and peroxidase and maintain product stability. Even though microfiltered samples were sterile for 190 days, the samples were acceptable for sensory attributes till day 90 of storage. Microfiltration and use of additives were thus found to increase the shelf life of tender coconut water.

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Acknowledgement

The author is thankful to Department of Science and Technology, New Delhi for grant of DST INSPIRE fellowship (DST/INSPIRE Fellowship/2013/[482]). The authors thank the faculty members, lab members and other research scholars of the department of Food Engineering and Technology, Tezpur University for participating in sensory studies. The equipment facilities provided by AICTE-NEQIP and DST-FIST are acknowledged.

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Authors and Affiliations

  1. Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India

    Nikhil Kumar Mahnot & Charu Lata Mahanta

  2. Department of Molecular Biology and Biotechnology, School of Sciences, Tezpur University, Assam, India

    Kuldeep Gupta

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  1. Nikhil Kumar Mahnot
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Correspondence to Charu Lata Mahanta.

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Mahnot, N.K., Gupta, K. & Mahanta, C.L. Shelf life enhancement and associated quality and sensory changes on refrigerated storage of tender coconut water subjected to non-thermal microfiltration and treated with additives. J Food Sci Technol 56, 3408–3421 (2019). https://doi.org/10.1007/s13197-019-03825-3

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