Figure 4.

Absorbance profiles as a function of pH for different mixed systems (in all cases, concentration was fixed at [OA] = 5 mM). (A) Mixtures with alkanes of different chain length, at a fixed 1:10 (alkane/OA) ratio. No changes in this general behavior were observed with higher relative amounts of alkane, up to 1:2 ratios. (B) Mixtures with alcohols of different chain length, at a fixed 1:10 (alcohol/OA) ratio. (C) Mixtures with hexadecanol, at different ratios: the higher the relative amount of alcohol, the stronger the effect on turbidity. Graphs on the righthand side (D–F) represent the corresponding absorbance values for a fixed pH (9.2).