No. Sample The concentration of solution, g/l The threshold concentration of n-heptane, % wt.
1 Oil (top part) 500 60.8
2 Oil (bottom part) 500 57.5
3 Oil (top part) 125 61.4
4 Oil (bottom part) 125 59.7
5 Maltenes + А1 asphaltenes (5%) (top part) 125 48.1
6 Maltenes + А1 asphaltenes (15%) top part) 125 43.3
7 Maltenes + А2 asphaltenes (5%) (top part) 125 77.4
8 Maltenes + А1 asphaltenes (5%) (bottom part) 125 44.9
9 Maltenes + А2 asphaltenes (5%) (bottom part) 125 69.5
Table 2: The threshold concentration of heptane for solutions of oils and model systems.