The pH and the pH-buffering capacity of the size-reduced
straw material were used to characterize the fibreboard after
pretreatment. These properties were measured using a modified
method suggested by Johns and Niazi (1980). The straw
and fibre samples were diluted in water at room temperature.
The pH-buffering capacity data in Table 3 is expressed as the
added amount of 0.1M H2SO4 titration solution required to
reach a pH of 3.0.