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Type: Artigo de periódico
Title: High-performance Liquid Chromatographic Determination Of The Geometrical Isomers Of β-carotene In Several Foodstuffs
Author: Carvalho C.R.L.
Carvalho P.R.N.
Collins C.H.
Abstract: To better evaluate the provitamin A content of foodstuffs, an HPLC separation of the geometric isomers of β-carotene was developed. Of the several different stationary phases studied, the best separations of all-trans-9-cis- and 13-cis-β-carotene were obtained with calcium hydroxide columns using isocratic elution with n-hexane, isooctane or mixtures of these solvents. When xanthophyll pigments are also present, a gradient elution with acetone in isooctane is required. These techniques were used to determine the provitamin A content of squash, peaches, dendêoil (palm tree oil) and orange juice. © 1995 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/0021-9673(94)00752-U
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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