On-line identification of trans-resveratrol in red wine using a sweeping technique combined with capillary electrophoresis/77 K fluorescence spectroscopy

Min Chi Hsieh, Cheng Huang Lin

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The feasibility of combining the techniques of on-line concentration and capillary electrophoresis/low-temperature fluorescence spectroscopy (CE/LTFS) for the detection and identification of trans-resveratrol in red wine at 77 K is demonstrated for the first time. This technique, involving sweeping-micellar electrokinetic chromatography (sweeping-MEKC), was used for the initial on-line concentration and separation, after which a cryogenic molecular fluorescence experiment was performed at 77 K. In comparison with normal-MEKC mode, a ∼1500-fold improvement in detection sensitivity could be obtained when the sweeping-MEKC was applied. The proposed method permits not only the separation and detection of trans-resveratrol from red wine extracts but also ensures that the on-line spectrum is readily distinguishable and can be unambiguously assigned at 77 K.

Original languageEnglish
Pages (from-to)677-682
Number of pages6
JournalElectrophoresis
Volume25
Issue number4-5
DOIs
Publication statusPublished - 2004 Feb

Keywords

  • Capillary electrophoresis
  • Low-temperature fluorescence spectroscopy
  • Sweeping-micellar electrokinetic chromatography
  • Trans-resveratrol

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry

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