Abstract
The flow injection analysis (FIA) of dissolved ozone was investigated by employing 2% potassium iodide-0.1% starch aqueous solution as a reagent. The sampling rate and the detection limit were improved compared with values obtained with potassium iodide aqueous solution as the reagent. The sampling frequency and the reproducibility of FIA signal were 105 samples h-1 and RSD=0.28% (2.12mg dm-3 O3; n=5), respectively. The S/Nof FIA signal was good (0.24mg dm-3 O3; S/N, 7.0), and the sub mg dm-3 levels of ozone were easily detected. The kinetic order of ozone decomposition in water was examined by using this FIA. Application to the determination of ozone decomposition rate was achieved.
