Interactions between lipophilic antioxidants measured by photochemiluminescence assay and α-tocopherol equivalent antioxidant capacity assay as well as the influence of matrix compounds on the lipophilic antioxidant capacity

The influences of glucose, fructose, saccharose and starch on the antioxidant capacity were determined by PCL and α-TEAC, too. All sugars can have an effect on the lipophilic antioxidant capacity depending on the extraction solvent. The sugar samples, extracted with n-hexane, did not show any antioxidant capacity in α-TEAC assay. In the PCL, the antioxidant potentials of sugars were dependent on the extraction solvent and reflected the dissolubility of sugars in methanol. The better the solubility the higher the antioxidant capacity. Additionally, sugars did not interact with antioxidants, with exception of the methanolic fructose extract.