Liquid chromatographic method for the analysis of tocopherols in malt sprouts with supercritical fluid extraction

J Chromatogr A. 2001 Nov 23;935(1-2):87-91. doi: 10.1016/s0021-9673(01)01080-9.

Abstract

A simple, specific and sensitive high-performance liquid chromatographic method has been developed for the determination of tocopherols in malt sprouts. A supercritical fluid extraction (SFE) procedure was used to isolate tocopherols from the vegetal matrix before quantitative analysis. The analytes were separated on a Zorbax reversed-phase column using methanol-water as mobile phase and quantified by measuring its fluorescence at lambda(em)=328 nm after excitation of the analytes at lambda(exc)=303 nm. The limits of detection for alpha-, gamma- and delta-tocopherols were 0.04, 0.05, and 0.05 microg/ml, respectively. The calibration graphs of the method were linear from 0.1 to 1.5, 0.2 to 2.5, and 0.2 to 2.0 microg/ml, for alpha-, gamma- and delta-tocopherols, respectively. This SFE and HPLC procedure is simple, precise and accurate for the determination of tocopherols in malt sprouts.

MeSH terms

  • Calibration
  • Chromatography, High Pressure Liquid / methods*
  • Chromatography, Supercritical Fluid / methods*
  • Edible Grain / chemistry*
  • Sensitivity and Specificity
  • Spectrometry, Fluorescence
  • Tocopherols / analysis*

Substances

  • Tocopherols