The research of the red Pigment Inflorescence ofPhlox paniculata and Its Stabibity

The paper is based on a research of the inflorescence of Phlox paniculata.Lsp.The experiment studies include the effects of light ,pH value,reductant,oxide,sucrose,sodium benzoate and metal ion on stability of the red pigment .It proves that pigment is poor in resistance against light ,heat, reductant and oxide. The red pigment is found in the experiments that sucrose,sodium benzoate have effects on the stability of the red pigment。Metal ions such as Na+, Al3 +, Zn2 + have faintly effects on the stability of the red pigment while other ions such as K+, Mg2 , Ca2 + have not effect on it,and the increasement of ions such as Fe3 + + have changed the color of solution of pigment and influenced on the chroma of pigment.