1.1 ,This test method covers the determination of hydrocarbon types over the concentration ranges from 5 ,% to 99 ,% by volume , aromatics, 0.3 ,% to 55 ,% by volume ,olefins, and 1 ,% to 95 ,% by volume , saturates in petroleum fractions that distill below 315 ,°,C. This test method may apply to concentrations outside these ranges, but the precision has not been determined. Samples containing dark-colored components that interfere in reading the chromatographic bands cannot be analyzed.