Study on Extraction Technology and Light and Heating Stability of Red Pigment from Mulberry

Taking market mulberry in Panzihua as material,the extraction technology of red pigment from mulberry was optimized with single factor experiment and orthogonal experiment.The light and heating stability of red pigment were also discussed.The results indicated that optimum extraction conditions were determined as follows:the mixture solution of volume ratio was 95% ethanol and 0.5% HCl for 8∶2 as extracting solvent,material to liquid ratio 1∶20(mass∶volume),temperature 40℃,time 2.0 h.The change of temperature and illumination time had a significant impact on red pigment from mulberry.Therefore,it should be stored in low temperature during application and storage,and avoid sun exposure,to prevent oxidation and decomposition.