Allolactose and 6-0-β-D-Galactopyranosyl-D-Galactose in Commercial Yogurt

Abstract

Commercially available yogurts were analyzed for sugar content by gas-liquid chromatography. Allolactose (6-0-β-D-galactopyranosyl-D-glucose) and 6-0-β-D-galactopyranosyl-D-galactose were identified as permethylated saccharide alditols by gas-liquid chromatography and mass-spectrometry. Lactose ranged from 2.11 to 3.13%, galactose varied from 1.11 to 1.52%, allolactose and 6-0-β-D-galacto-pyranosyl-D-galactose were detected at low concentrations (.03 to .09%), and glucose was only in trace amounts (0 to .03%). © 1982, American Dairy Science Association. All rights reserved.