Optimization of Extraction Processes of Pigment and Pectin from Pyracantha fortuneana Fruits

The fruit pigment of Pyracantha fortuneana was extracted into aqueous ethanol solution,and the residue was then hydrolyzed with hydrochloric acid to obtain pectin existing in the supernatant.Orthogonal array designs L9(33)and L9(34)were used to optimize the extraction processes for pigment and pectin.The optimum conditions for pigment extraction were as follows:extraction temperature 90℃;extraction time 2 h;and solid-to-liquid ratio 1:20(m/V),which gave a crude pigment yield of 25.31%,and those for pectin extraction were as follows:extraction temperature 90℃;extraction time 2.5 h;initial pH 1.5;and solid-to-liquid ratio 1:25(m/V),under which a pectin yield of 4.72%was achieved.The two processes are of low-cost equipment investment and simplicity,thereby being suitable for massive production.