Liliang Zhang

US Patent:

20100159613, Jun 24, 2010

Filed:

Dec 24, 2008

Appl. No.:

12/317500

Inventors:

Boxin Ou - Franklin MA, US
Liliang Zhang - Mansfield MA, US
Miwako Kondo - Taunton MA, US
Hongping Ji - Jiangsu, CN
Yan Kou - Jiangsu, CN

International Classification:

G01N 33/566

US Classification:

436501

Abstract:

A method for assaying the antioxidant capacity of a skin care product, the method including preparing an emulsion base, dissolving a sample of a skin care product into the emulsion base to form a homogeneous emulsion mixture, adding a detection probe to the homogeneous emulsion mixture, adding reactive oxygen species generator and/or reactive nitrogen species generator to the homogeneous emulsion mixture, measuring the fluorescence intensity change of the detection probe in the presence of the sample over time, in the presence of the standard over time, and in the presence of a blank over time, and calculating the initial rate of oxidation of the detection probe to determine the antioxidant capacity of the sample of the skin care product.