Beech wood was used to investigate the effect of the different
parameters of the demineralizing process. The parameters that were
studied were the nature of the acid (HNO3 and CH3COOH), the acid
concentration in the washing solution (0.1% and 1%), the temperature
(room temperature and 50 C) and the duration of the treatment
(2 and 4 h). The optimal conditions were established and were then
applied for the treatment of the remaining six biomass samples.