Micellar electrokinetic chromatography of monosaccharides derivatized with 1-phenyl-3-methyl-2-pyrazolin-5-one

Mono- and disaccharides derivatized with 1-phenyl-3-methyl-2-pyrazolin-5-one (PMP) were separated by micellar electrokinetic chromatography (MEKC), on the basis of their ability to differentially partition between an electroendosmotically driven aqueous phase and sodium dodecyl sulfate micelles. The use of a Tris phosphate buffer, pH 7.5, containing 50 mM sodium dodecyl sulfate, provided good resolution of neutral and basic monosaccharides and disaccharides. Baseline resolution was accomplished for the monosaccharides most commonly found in glycoproteins. A mass detection limit of 20 femtomoles, at a signal-to-noise ratio of three, was achieved by monitoring UV absorbance at 245 nm. The applicability of the system described to the identification and quantitation of monosaccharides obtained from carbohydrate hydrolysates from glycoproteins was investigated.