Assay of antioxidant concentration by titration with peroxy radicals

摘要

Effective antioxidant levels in hydrocarbonaceous materials are determined by (a) establishing the rate of uninhibited oxygen absorption for a standard liquid comprising (i) an oxidizable material susceptible to free radical oxidation and (ii) an agent that causes free radical oxidation; (b) establishing the rate of oxygen absorption for a test liquid comprising (a) (i) and (a) (ii) and a dispersible amount of the hydrocarbonaceous material or extract therefrom comprising antioxidant; (c) ascertaining the delay before uninhibited oxygen absorption of the test liquid and (d) determining the effective concentration of the antioxidant in the hydrocarbonaceous material. If the antioxidant in the hydrocarbonaceous material is known, the concentration can be accurately determined.