Chlorophylls in silkworm excrement were extracted with acetone using ultrasonics method.Then results of three extraction methods,ultrasonics,traditional method and supercritical carbon dioxide extraction,were compared.Last the physical and chemical properties of silkworm excrement cholrophylls were studied.The result showed that the optimum technological parameters of chlorophyll extraction with acetone using ultrasonics were as follws:silkworm excrement power,the solid-liquid ratio was 1(g):2.5(mL),the ext...