Process for the extraction of natural red pigment

The extraction of natural red pigment was studied.Single factor test and orthogonal experiment design method(L9(33))were applied to analyze the influence of factors such as sorts of solvent,temperature and solid-liquid ratio on the extraction percent of the red pigment.Experimental results indicated that temperature significantly affect the extraction percent of the red pigment,acetone was the best solvent with the optimum temperature being 35 ℃,the solid-liquid ratio 1∶5,and the extraction rate of red pigment up to 92.3%.