Novel, highly robust method of carbohydrate pre-purification by two-dimensional liquid chromatography prior to liquid chromatography/mass spectrometry or gas chromatography/mass spectrometry

Eduard Rogatsky, Daniel Stein

Research output: Contribution to journalArticle

10 Scopus citations


We describe a novel two-dimensional liquid chromatography (2D-LC) method for fast and robust isolation and concentration of low abundant carbohydrates (sorbitol, glycerol) from biological matrices (plasma and urine). Off-line pre-purified fractions, enriched by analyte of interest, were analyzed by liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS-MS). Initial 2D-LC automated sample pre-purification improved MS detection, eliminated matrix effects, and achieved high sensitivity (picogram detection limit) with a 6 min runtime and increased column lifetime. Using this method we have analyzed more than 1300 samples from biological matrices without column replacement.

Original languageEnglish (US)
Pages (from-to)11-16
Number of pages6
JournalJournal of Chromatography A
Issue number1-2
StatePublished - May 6 2005



  • 2D liquid chromatography
  • Carbohydrate analysis
  • Human plasma
  • LC/MS

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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