Technology of Extracting Pigments from Flesh of Red-fleshed Pitaya

On the basis o f single-factor test,using response surface analysis to optimize technological conditions of extracting pigments fromred-fleshed pitaya by selecting extraction temperature,pH value and extraction time as factors and absorbance of pigments in red-fleshed pitaya solution as response surface.The results showed that when extraction temperature,pH and extraction time were 30℃,4.5 and 36 min,respectively,the predicted absorbance of pigments in redfleshed pitaya was 0.401,and the actual absorbance verified by experiment was 0.405.Therefore,it is feasible to optimize technological conditions of extracting pigments from red-fleshed pitaya using response surface analysis method.