PACKAGING PRESERVATION OF β-CAROTENE IN SWEET POTATO FLAKES USING FLEXIBLE FILM AND AN OXYGEN ABSORBER

Authors

  • CURT EMENHISER,

    1. Department of Food Science, Box 7624, North Carolina State University, Raleigh, NC 27695–7624
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  • RUTH H. WATKINS,

    1. Department of Food Science, Box 7624, North Carolina State University, Raleigh, NC 27695–7624
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  • NADA SIMUNOVIC,

    1. Department of Food Science, Box 7624, North Carolina State University, Raleigh, NC 27695–7624
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  • NOEL SOLOMONS,

    1. Center for Studies of Sensory Impairment Aging and Metabolism (CeSSIAM), Hospital de Ojos y Oidos, Diagonal 21 y 19 Calle - Zona 11, Guatemala City, Guatemala 01011
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  • JESUS BULUX,

    1. Center for Studies of Sensory Impairment Aging and Metabolism (CeSSIAM), Hospital de Ojos y Oidos, Diagonal 21 y 19 Calle - Zona 11, Guatemala City, Guatemala 01011
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  • JOHN BARROWS,

    1. International Eye Foundation, 7801 Norfold Ave.-Suite 200, Bethesda, MD 20814
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  • STEVEN J. SCHWARTZ

    Corresponding author
    1. Department of Food Science and Technology, 144 Howlett Hall, 2001 Fyffe Court, The Ohio State University, Columbus, OH 43210–1096
      To whom inquiries should be directed: telephone: 614–292–2934; FAX: 614–292–4233; e-mail: Schwartz. 177@osu.edu
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To whom inquiries should be directed: telephone: 614–292–2934; FAX: 614–292–4233; e-mail: Schwartz. 177@osu.edu

ABSTRACT

Sweet potato flakes are potentially an affordable, shelf-stable source of provitamin A β-carotene. Because β-carotene is susceptible to oxidative degradation, particularly in dehydrated food materials exposed to atmospheric oxygen, several packaging conditions were evaluated for enhancement of β-carotene retention in sweet potato flakes during storage. The flakes were packaged in either a polypropylene film (high oxygen permeability) with air headspace or a nylon laminate film (low oxygen permeability) with air headspace, under vacuum, or with an Ageless oxygen absorber sachet enclosed. Packaged flakes were stored in the dark at ambient laboratory temperature (∼23C), and β-carotene content was determined at intervals from 0 to 210 day storage using reversed-phase liquid chromatography. Among the packaging conditions tested, β-carotene retention was enhanced incrementally as the apparent availability of oxygen was reduced (nylon > polypropylene; oxygen absorber > vacuum > air headspace). The combined use of oxygen absorbers and flexible oxygen barrier film gave excellent retention of β-carotene during the 210 day trial.

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