The anthocyanin pigments extracted from black rice, red raspberry and cabbage were chosen to study their characterization. The methods of p H-differential and LC-MS were used to determine the content and composition of the anthocyanin respectively. The qualitative and quantitative changes of the copigmentation between Tannin acid and the anthocyanins were investigated by UV-vis and CIELab color space assay. The mechanism of the interaction between bovine serum albumin(BSA) and anthocyanin was also studied i...