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

Abstract
Commercially available yoghurts were analyzed for sugar content by GLC. Allolactose (6-O-.beta.-D-galactopyranosyl-D-glucose) and 6-O-.beta.-D-galactopyranosyl-D-galactose were identified as permethylated saccharide alditols by GLC and mass spectrometry. Lactose ranged from 2.11-3.13%, galactose varied from 1.11-1.52%, allolactose and 6-O-.beta.-D-galactopyranosyl-D-galactose were detected at low concentrations (0.03-0.09%) and glucose was only found in trace amounts (0-0.03%).