Abstract：Color fixatives such as sodium erythorbate, citric acid, sodium metabisulfite were used separately or together to study
their effects on the color protection of semi-dry chicken pet food. The results of single color protection experiments showed that
sodium metabisulfite had the best effectiveness in the color protection of semi-dry chicken pet food, followed by citric acid and
sodium erythorbate. Citric acid could enhance the protecting effects of the other two color fixatives on the color of semi-dry
chicken pet food. When the mixing ratio of citric acid and sodium metabisulfite was 2:1 (m/m), the golden yellow color of semidry
chicken pet food was well maintained, and color darkening was retarded dramatically.
2011, Vol. 25 
