Study on the Best Extracting Process of the Red Pigment in Raspberry

With single factor analysis and orthogonal tests,the influence of the concentration of extraction solvent,the ratio of material to solvent,extracting temperature,extracting time on extraction of pigment was studied and the optimal extracting conditions of red pigment in raspberry were determined.The results showed that when the concentration of HCl was 2.0 mol/L,the ratio of material to solvent(W/V)was 1∶12,the extracting temperature was 40℃,the extracting time was 4 h and extracted continuously 2 times,the total extracting rate above 95%,the order of the extracting factors influencing on the extracting effect was concentration of extraction solventextracting temperatureextracting timethe ratio of material to solvent.