Calculating the color val-ue of sorghum pigment in the solvents ought to be on the basis of ABS at 492.5nm and 500nm which matched with the red brown color.

• 在四种不同溶剂中，高粱色素均呈红棕色透明溶液，与红棕色相匹配的波长492.；5nm及500nm处的吸光度即为计算高粱色素在四种不同溶剂中的色价依据。