A comparison of ozone quantitative analysis methods by using spectrophotometric and
volumetric method has been studied. The aim of this research is to determine the better
method by considering the effect of reagent concentration and volume on the measured
ozone concentration. Ozone which was analyzed in this research was synthesized from air,
then it is used to ozonize methyl orange and potassium iodide solutions at different
concentration and volume. Ozonation was held for 20 minutes with 363 mL/minutes air
flow rates. The concentrations of ozonized methyl orange and potassium iodide solutions
was analyzed by spectrophotometric and volumetric method, respectively. The result of
this research shows that concentration and volume of reagent having an effect on the
measured ozone concentration. Based on the results of both methods, it can be concluded
that volumetric method is better than spectrophotometric method.