Publicación:
Phenolic compounds from Andean mashua (Tropaeolum tuberosum) tubers display protection against soybean oil oxidation
Phenolic compounds from Andean mashua (Tropaeolum tuberosum) tubers display protection against soybean oil oxidation
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Fecha
2012
Autores
Betalleluz-Pallardel I.
Chirinos R.
Rogez H.
Pedreschi R.
Campos D.
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Editor
SAGE
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Abstracto
Phenolic compounds from mashua tuber were evaluated as potential antioxidants to retard the oxidation of
crude soybean oil submitted to accelerated storage and frying. During the accelerated storage, an ethanolic
crude extract, a purified extract, an aqueous fraction and an ethyl acetate fraction from mashua containing
different gallic acid equivalent concentrations (100, 300 and 600 ppm) in oil were evaluated at 55 C. After
15 days of storage, better effects were evidenced against soybean oil oxidation at 300 and 600 ppm of ethyl
acetate fraction in comparison to 200 ppm butylated hydroxytoluene and the control (no antioxidant added).
During the frying process at 180 C, principal component analysis revealed that the content of trienes and
dienes were strongly correlated with the frying batch. Ethyl acetate fraction at 200 ppm showed the highest
efficacy against oil oxidation in terms of polar compound values, free fatty acids and conjugated dienes and
trienes in comparison to the oil containing 200 ppm tert-butylhydroquinone and control. Differential scanning
calorimetry corroborated the efficacy of ethyl acetate fraction phenolic and it is strongly recommended as
method for validation of results. This study provides strong evidence related to the excellent protective effects
against soybean oil oxidation of mashua phenolics. This crop could be utilized as an alternative source of
natural antioxidants by the oil industry
Descripción
Palabras clave
Tubes (components),
Oxidative stability,
Peroxide value,
Phenolic compounds,
Soybean oil,
Soybean oil,
Tropaeolum tuberosum,
Differential scanning calorimetry,
Differential scanning calorimetry,
Oils and fats,
Oils and fats,
Oilseeds,
Olefins,
Oxidation,
Principal component analysis,
Solvent extraction