Additionally, the carbohydrate content increased significantly with increasing cooking severity. This effect was observed particularly for samples precipitated at pH 2.5. The amount of xylan (xylose) in the pH 2.5-precipitated lignin isolated from the initial, bulk, and residual phases of kraft cooking increased from 8.0% to 13.8%, and to 31.7% (based on the oven-dry precipitates), respectively.Inallcases,thexylan(xylose)contentcomprisedmorethan 80wt% of the total carbohydrates. This was also reported for kraft Eucalyptus globulus lignin and soda brewer’s spent grain, where xylanwasfoundtobethemainpolysaccharidelinkedtothelignin (Fernández-Costas et al., 2014; Sun and Tomkinson, 2001).