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Agronomía Colombiana

Print version ISSN 0120-9965


MEJIA, Liliana Josefina; NARVAEZ, Carlos Eduardo  and  RESTREPO, Luz Patricia. Physical, chemical and organoleptic changes during frozen storage of araza (Eugenia stipitata Mc Vaugh) pulp. Agron. colomb. [online]. 2006, vol.24, n.1, pp.87-95. ISSN 0120-9965.

The effects of slow -20 °C freezing on araza fruit (Eugenia stipitata Mc Vaugh) pulp were evaluated. Pulp was stored for 4 months and aroma, flavour, texture, appearance and colour (sensory characteristics) and pH, acidity, soluble solids, ascorbic acid, carotenoids, phenol compounds and antioxidant activity (physicochemical properties) were evaluated by the ß-carotene blanching method each fortnight. Organoleptic evaluation led to the conclusion that freezing the pulp conserved it well during the first 30 days’ storage, retaining good sensory characteristics. Although texture and ascorbic acid became depleted during this period, phenol compounds, carotenoids and antioxidant activity remained constant. It should be taken into account that araza fruit has high levels of substances having good antioxidant activity; it is thereforedesirableto continueworkingontechniques for prolonging its quality for longer periods of time.

Keywords : antioxidant activity; ascorbic acid; phenol compounds.

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