1992
DOI: 10.1007/bf02275893
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Comparison of provitamin A determination by normal-phase gravity-flow column chromatography and reversed-phase high performance liquid chromatography

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Cited by 38 publications
(31 citation statements)
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“…Minerals were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES) using the Vista-MPX equipment (Varian, Inc., Agilent Technologies, Santa Clara, CA, USA). Carotenoids were evaluated by β-carotene quantification using high-performance liquid chromatography (HPLC) (Carvalho et al, 1992). All analyses were carried out at least in triplicate.…”
Section: Methodsmentioning
confidence: 99%
“…Minerals were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES) using the Vista-MPX equipment (Varian, Inc., Agilent Technologies, Santa Clara, CA, USA). Carotenoids were evaluated by β-carotene quantification using high-performance liquid chromatography (HPLC) (Carvalho et al, 1992). All analyses were carried out at least in triplicate.…”
Section: Methodsmentioning
confidence: 99%
“…The analyses of retinol and b-carotene were carried out at 'Instituto de Tecnologia de Alimentos' (ITAL -Campinas, Brazil), through High Performance Liquid Chromatography (HPLC) (MANZ;PHILIPP, 1988;CARVALHO;COLLINS;RODRIGUES-AMAYA, 1992) and the results were converted into International Units of vitamin A (IU), using the following conversion factor: 1.8 for b-carotene and 0.3 mcg of retinol for 1 IU (NATIONAL RESEARCH COUNCIL, 1989).…”
Section: Methodsmentioning
confidence: 99%
“…8 Para a extração dos carotenoides, foram tomados cerca de 0,5 g de polpa de tomate liofilizada, adicionados cerca de 3 g de hyflosupercel, homogeneizado e hidratado com 20 mL de água. Os carotenoides foram extraídos, de forma sequencial, com uma porção de 50 mL e três porções de 30 mL de acetona, em desintegrador por 1 min, até a descoloração da amostra.…”
Section: Método Analíticounclassified