Normal-phase high-performance liquid chromatography of tocopherols and tocotrienols - Comparison of different chromatographic columns

Afaf Kamal-Eldin, Stefanie Görgen, Jan Pettersson, Anna Maija Lampi

Research output: Contribution to journalArticlepeer-review

145 Citations (Scopus)

Abstract

Natural vitamin E is composed of eight different vitamers (α-, β-, γ- and δ-tocopherols and α-, β-, γ- and δ-tocotrienols). As these eight vitamers have different antioxidant and biological activities, it is necessary to have quantitative data on each substance separately. The aim of this study was to find universal HPLC columns for the separation of all eight components and to test if a few columns of the same material (different batches) will give reproducible results. Normal-phase HPLC separations of vitamin E compounds in a prepared mixture (containing oat extracts, palm oil and tocopherol standards) were tried on six silica, three amino and one diol columns. As shown by calculations of retention factors (k), separation factors (α), numbers of theoretical plates (N) and resolutions (R(s)), the best separations were obtained on three silica columns and two amino columns using 4 or 5% dioxane in hexane as the mobile phase as well as on a diol column using 4% tert.-butyl methyl ether in hexane as the mobile phase. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)217-227
Number of pages11
JournalJournal of Chromatography A
Volume881
Issue number1-2
DOIs
Publication statusPublished - Jun 9 2000
Externally publishedYes

Keywords

  • Food analysis
  • Tocopherols
  • Tocotrienols
  • Vitamins

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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