Abstract: The immunoprotective properties of bovine milk IgG have led to a recent proliferation of nutritional products incorporating this protein. These kinds of products are always priced by the content of IgG. It has therefore become critical that reliable analytical techniques for the measurement of the IgG content in such products are available. This literature summarized the universal method in the world including separation-based chromatography, electrophoresis, immunoassay and physical techniques. Meanwhile we compared the advantage and disadvantage of these kinds of methods.

Key words: IgG; milk; milk products; analysis