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|Type:||Artigo de periódico|
|Title:||High-performance Liquid Chromatographic Determination Of The Geometrical Isomers Of β-carotene In Several Foodstuffs|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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