Extraction of Red Pigment from Pericarp of Viburnum sargentii and Study on Its Stability

Using pericarp of Viburmum sargentii koehne as material,red pigment was extracted using heat lixiviation method.The extraction techniques were optimized by single factor tests and orthogonal experiment.Furthermore,the stability of red pigment to light or heat was tested.The results showed that the optimum extraction parameters were as follows,using 80%(volume fraction) ethanol with pH 2 as extract solution,material to liquid ratio mViburnum sargentii pericarp∶Vethanol=1∶40,extraction temperature at 60 ℃,and extraction time for 1.5 h,extracted for twice.The pigment was easy to fade under natural light condition,and would brown when temperature was above 80 ℃.