For cellulose, due to
overloading of levoglucosan, it was necessary to perform the analyses
with a split rato 1:50. Analytes were separated by a HP-5 fused-silica
capillary column (stationary phase poly [5% diphenyl/95% dimethyl]
siloxane, 30 m, 0.25 mm i.d., 0.25 mm film thickness), using helium as
carrier gas (at constant pressure, 33 cm3 s-1 linear velocity at
200 °C)