Hot water, UV-C and superatmospheric oxygen packaging as hurdle techniques for maintaining overall quality of fresh-cut pomegranate arils

Authors

  • Mahshad Maghoumi,

    1. Department of Horticultural Science, College of Agriculture and Natural Resource, University of Tehran, Karaj, Iran
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  • Perla A Gómez,

    1. Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Campus Muralla del Mar, E-30202 Cartagena, Murcia, Spain
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  • Francisco Artés-Hernández,

    1. Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Campus Muralla del Mar, E-30202 Cartagena, Murcia, Spain
    2. Postharvest and Refrigeration Group, Department of Food Engineering, Universidad Politécnica de Cartagena, Campus P. Alfonso XIII, 48, E-30203 Cartagena, Murcia, Spain
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  • Younes Mostofi,

    1. Department of Horticultural Science, College of Agriculture and Natural Resource, University of Tehran, Karaj, Iran
    2. Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Summerland, BC, V0H 1Z0, Canada
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  • Zabihalah Zamani,

    1. Department of Horticultural Science, College of Agriculture and Natural Resource, University of Tehran, Karaj, Iran
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  • Francisco Artés

    Corresponding author
    1. Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Campus Muralla del Mar, E-30202 Cartagena, Murcia, Spain
    2. Postharvest and Refrigeration Group, Department of Food Engineering, Universidad Politécnica de Cartagena, Campus P. Alfonso XIII, 48, E-30203 Cartagena, Murcia, Spain
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Francisco Artés, Institute of Plant Biotechnology, Universidad Politécnica de Cartagena, Campus Muralla del Mar, E-30202 Cartagena, Murcia, Spain. E-mail: fr.artes@upct.es

Abstract

BACKGROUND: In recent years there has been increasing consumer pressure to avoid the use of agrochemicals such as chlorine on fresh plant products for extending their shelf life. The combined use of eco-sustainable techniques may be an alternative. The effect of hot water (HW), ultraviolet-C (UV-C) light and high oxygen packaging (HO) on the overall quality of fresh-cut pomegranate arils stored under modified atmosphere packaging (MAP) for up to 14 days at 5 °C was studied.

RESULTS: Arils extracted manually, washed with chlorine (100 µL L−1 NaClO, pH 6.5, 5 °C water), rinsed and drained were exposed to single or combined (double and triple) hurdle techniques. The HW treatment consisted of a 30 s immersion in water at 55 °C followed by air surface drying. A 4.54 kJ m−2 dose was used for the UV-C treatment before packaging. Active MAP with initial 90 kPa O2 was used in the HO treatment. The respiration rate remained relatively constant throughout shelf life, with no differences among treatments. CO2 accumulation was higher within HO packages. HW induced a slight reduction in total soluble solids, while no changes in titratable acidity were found. HO-treated arils had the highest phenolic content, while the lowest was found in HW-treated arils. The lowest antioxidant activity was found in HW + UV-C + HO and the highest in UV-C + HO and HO treatments. HW alone or in combination with UV-C and HO inhibited mesophile, mould and yeast growth, while UV-C + HO was most effective for controlling yeast and mould growth.

CONCLUSION: UV-C and HO either alone or in combination are promising techniques to preserve the quality of pomegranate arils for up to 14 days at 5 °C. © 2012 Society of Chemical Industry

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