Rapid assay of vitamin E in vegetable oils by reversed-phase capillary electrochromatography (Articolo in rivista)

Type
Label
  • Rapid assay of vitamin E in vegetable oils by reversed-phase capillary electrochromatography (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/elps.200410181 (literal)
Alternative label
  • Zeineb Aturki; Giovanni D'Orazio, Salvatore Fanali (2005)
    Rapid assay of vitamin E in vegetable oils by reversed-phase capillary electrochromatography
    in Electrophoresis (Weinh., Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Zeineb Aturki; Giovanni D'Orazio, Salvatore Fanali (literal)
Pagina inizio
  • 798 (literal)
Pagina fine
  • 803 (literal)
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  • 26 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
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  • 4-5 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
  • Google Scholar (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Metodologie Chimiche; Istituto di Metodologie Chimiche; Istituto di Metodologie Chimiche (literal)
Titolo
  • Rapid assay of vitamin E in vegetable oils by reversed-phase capillary electrochromatography (literal)
Abstract
  • A rapid capillary electrochromatographic (CEC) method for the analysis of vitamin E in vegetable oils is reported. Vitamin E consists of a group of eight isomers, tocopherols(TOHs) and tocotrienols. The separation of four TOHs (a-, g-, d-TOH), a-tocopherol acetate (a-TOH-Ac), and an antioxidant compound, butylated hydroxytoluene (BHT) used to prevent TOH autoxidation, was optimized. The CEC experiments were carried out in a 75 micron inner diameter (ID) fused-silica capillary, partially packed with 3 micron C18 stationary phase (33 cm total length, 8.4 cm and 7 cm effective and packed lengths, respectively). The optimum mobile phase was a polar organic phase composed of a mixture of methanol-acetonitrile in the ratio 50/50 v/v containing 0.01% ammonium acetate, applying a voltage and temperature set at 225 kV and 20'C, respectively. The tocopherols and the BHT were successfully separated within 2.5 min using the shortend injection method. Under these experimental conditions, repeatability of retention time and peak area, analyte detection and quantitation limits, linearity, precision, and accuracy were studied. The CEC method was applied to determine the content of TOHs in different commercially available oils of virgin olive, hazelnut, sunflower, and soybean. The extraction of vitamin E isomers from oil samples was achieved using methanol and a methanol-isopropanol mixture. (literal)
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