Simultaneous quantification of vitamin E, γ-oryzanols and xanthophylls from rice bran essences extracted by supercritical CO2.
Food Chem
; 211: 140-7, 2016 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-27283617
ABSTRACT
Since the nutrition value of rice is diminished during rice processing, technology that can preserve and sustain functional compounds is necessary. In this study, supercritical carbon dioxide (SC-CO2) extraction was optimized for operational conditions (time, temperature, pressure and modifier) to extract vitamin E, γ-oryzanols and xanthophylls from rice bran. The simultaneous quantification of the compounds was developed using high-performance liquid chromatography with diode array and fluorescence detectors. Central composite design and respond surface methodology were applied to achieve optimum extraction conditions. The optimized conditions were 60min, 43°C, 5420psi with 10% ethanol as a modifier. Pigmented rice bran extracts contained greater amounts of functional phytochemicals than non-pigmented rice bran extracts (0.68, 1410, and non-detectable µg/g compared with 16.65, 2480, and 0.10µg/g of vitamin E, γ-oryzanols and xanthophylls in pigmented and non-pigmented ones, respectively). SC-CO2 extraction with modifier would be promising for preparation of phytochemical essences for therapeutic purpose.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Fenilpropionatos
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Oryza
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Vitamina E
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Extratos Vegetais
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Xantofilas
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Cromatografia com Fluido Supercrítico
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article