ABSTRACT
Early researchers in the application of size exclusion chromatography (SEC) to asphalt (1-7) noted that size exclusion chromatography (SEC) [also called gel permeation chromatography (GPC)] was very sensitive to differences in asphalts and to changes in composition. This was exploited by Adams and Holmgreen (8) to show differences between various asphalts and between asphalts from the same supplier at different locations. Glover et al. (9, 10) used SEC to show how asphalts from a number of suppliers changed with the seasons. It has also been used to compare fractions produced by preparative SEC and other methods (9, 11-24).
