Two-mode Analysis by High-performance Liquid Chromatography of ρ-Aminobenzoic Ethyl Ester-derivatized Monosaccharides.

ρ-Aminobenzoic ethyl ester (ABEE)-derivatized monosaccharides were separated by HPLC with a trifluoroacetic acid (TFA) solution or borate buffer as the eluent. In the case of the TFA solution, ABEE-derivatized monosaccharides of the neutral and amino sugars found in animal glycoproteins were separated in a simultaneous analysis. In the case of the borate buffer, ABEE-derivatized monosaccharides of identical molecular weights such as ABEE-Gal, -Glc, and -Man were separated as stereoisomers. Glucuronic acid and galacturonic acid were detected and separated within 8 min. The relationship between the peak areas and the amounts of ABEE-derivatized monosaccharides was linear in the range of 1 to 1000 pmol.