the influence of complexing agents such as methanol , ethanol , 1-propanol , 1-butanol , 1-pentanol , 1-hexanol , cyclohexanol and 2-octanol on the formation of a blue coloured amylose - iodine complex ( ph 4.8 ) , under suboptimum concentrations of iodine and in the absence of potassium iodide , is studied by recording the absorbance at 640 nm .
C0001963
methanol
C0001962
ethanol