| Abstract: | The color reaction between partially saponified poly(vinyl acetate), (P-PVAc), which is dissolvable in water and iodine-iodide was investigated in the presence of amylose. As the concentration of amylose increases, the absorbance at λmax = 488 nm of the red-violet complex between P-PVAc and iodine-iodide decreases and, on the other hand, the absorbance at λmax = 625 nm of the blue complex between amylose and iodine-iodide increases. The equation for the relationship between the decrease in the red-violet complex and the increase in the blue complex was derived. On the basis of this equation, the molar absorption coefficient per iodine molecule at λmax = 625 nm for the blue complex of amylose with iodine-iodide was found to be 3,68·104 l mol?1 cm?1 at 15°C. |
