9. Calculation
9.1 Calculate the bitumen content, as follows:
where:
A = total mass of insoluble material present, g, and
B = total mass of water free sample used, g.
9.1.1 Report to the nearest 0.1 %.
10. Precision
10.1 Estimates of standard deviations
for this procedure and the criteria for judging the acceptability of results (95 % confidence level) are listed in Table 1.11. Keywords
11.1 bitumen; coal tar; solubility