The weight percentage of Fe2+ can be determined with 1,10-phenanthroline as chromogenic agent, and Fe2+ would be oxidized by bromate to Fe3+ and then 1,10-phenanthroline faded. Therefore, the content of bromate in water can be indirectly determined according to the stoichiometry amount of Fe2+. The linear range, detection limit, recovery, chromogenic conditions were studied and found that the recovery is 92.5%～108.7%, detection limit is 15～36 ng/L, the precision is less than 0.312.

Ultraviolet-visible spectrophotometry was used to determinate the content of bromate in mineral water and drinking water. The effect of reaction time, dosage of hydrochloric acid, dosage of potassium iodide, working curve and recovery were studied, and the content of bromate in mineral water and drinking water was tested ]in absence of the light as 10.33 and 9.33 μg/L, respectively. The recovery of mineral water is 96.03%~105.59%, while the recovery of drinking water is 95.89%~96.12%. The precision and detection limit of this method are 0.36 and 0.108, respectively. 

ZnO with spindle shape was synthesized by ultrasonic-assisted reflux method. The micrograph and structure of ZnO sample were charactered by SEM, TEM and XRD.The results show that basic content of solution, ultrasonic treatment and the mass of diethanolamine play an important role on the formation of ZnO with spindle shape. The growth mechanism of ZnO with spindle shape was discussed. Furthermore, the optical properties of ZnO with spindle shape were revealed by UV-Vis and fluorescence spectroscopy.