Figure 3
The release of sugars from filter paper and cotton linter by dilute acid and/or ferrous ion pretreatments at 190°C for five minutes. The released sugars, including both glucose and cellobiose (together glucose equivalent) and expressed in percentage of conversion of filter paper (FP) and cotton linter (CL) celluloses, were quantitated by HPLC analysis of the supernatants from the pretreatment of filter paper strips and cotton linter disks. Values are presented as the mean (± SE) of three replicates for each of the pretreatments. **P < 0.01 indicates statistical significance. Glu = glucose; HPLC = high-performance liquid chromatography.