Research and formula optimization of pork color auxiliary

The effects of different content of sodium erythorbate,nicotinamide,tea polyphenol on color difference,coloring ratio,myoglobin existence form and proportion,sodium nitrite residues were studied.In order to decrease the mount of sodium nitrite,the optimum chromogenic agents formula were determined by orthogonal interaction analysis method. The results showed that: the optimum additions of sodium erythorbate,nicotinamide,tea polyphenol was 400,300,500 mg / kg respectively with sodium nitrite addition of 100 mg / kg.The a*and coloring ratio of cured pork under the optimum chromogenic formula were up to12.78 and 56.67%,and the pork exhibited a bright rosy appearance and uniform color,which was maintained for a long time during storage.