Take the average absorbance of your cauliflower homogenate and determine the thiocyanate ion concentration using the previously plotted graph. This has value of 5 marks.

• 利用前一题所画出来的图，将所有的花椰菜均质液的分光光度计读数（吸光值）平均，并计算花椰菜均质液中硫氰盐的浓度。此题5分。