Study on the Processing Stability of Mulberry Pigment

Abstract:

The red pigment from mulberry pigment was dissolved in the solution of 1,0.1和0.01mol/L hydrochloric acid,citric acid,tartaric acid,respectively.The pigment solutions were then heated at 70℃for 5 hours,processed ultrasonically for 1 hour and placed in the light naturally for 3 days,respectively.With the changes of absorbance(512 nm) as index to evulate the stability of pigment.The result showed that the pigment stability was affected by the kind and concent of acid solution.It was found that the pigment exhibited high stability in hydrochloric acid,but big changes of absorbance in tartaric acid and citric acid solution.