Abstract
The rates of auto-oxidation of different concentrations of linoleic acid, solubilized in various aqueous solutions of Brij 35, a nonionic surfactant, at 39.6° have been determined as a function of the changes in the spectrophotometric absorbance at 233 mμ which arises from the formation of conjugated diene as the process of auto-oxidation proceeds. For any one surfactant concentration over the range of linoleic acid concentrations studied, the maximum rate of conjugated diene formation (equivalent to the rate of oxidation in the initial stages of the reaction) was found to be directly proportional to the initial micellar concentration of linoleic acid, expressed as the weight ratio of linoleic acid to surfactant. As the concentration of surfactant was increased, the change in the maximum rate, as a function of the weight ratio of linoleic acid to surfactant, decreased. These results are discussed in the light of previous work dealing with the auto-oxidation of solubilized oils. The rates of auto-oxidation of different concentrations of linoleic acid, solubilized in various aqueous solutions of Brij 35, a nonionic surfactant, at 39.6° have been determined as a function of the changes in the spectrophotometric absorbance at 233 mμ which arises from the formation of conjugated diene as the process of auto-oxidation proceeds. For any one surfactant concentration over the range of linoleic acid concentrations studied, the maximum rate of conjugated diene formation (equivalent to the rate of oxidation in the initial stages of the reaction) was found to be directly proportional to the initial micellar concentration of linoleic acid, expressed as the weight ratio of linoleic acid to surfactant. As the concentration of surfactant was increased, the change in the maximum rate, as a function of the weight ratio of linoleic acid to surfactant, decreased. These results are discussed in the light of previous work dealing with the auto-oxidation of solubilized oils.
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