Effects of solubility characteristics of sensitiser and pH on the photooxidation of oil in tuna oil-added acidic O/W emulsions

► Sensitiser solubility and pH affected photooxidation of tuna oil-added emulsion. ► Chlorophyll increased the oxidation of the emulsion under light. ► Erythrosine showed no significant effects on the photooxidation of the emulsion. ► Sodium azide increased oil photooxidation in the acidic emulsion. ► Singlet oxygen oxidation was higher in the emulsion with less acidic pH.