The reaction of ferric compound with sodium hypochlorite at 80℃ in high alkaline solution was traced using spectrophotometry method.The ferric compounds were oxidized firstly to generate the purple ferrate(Ⅵ) solution,then the ferrate(Ⅵ)was decomposed into ferric hydroxide precipitation,and at the same time the ferric compounds was oxidized into ferrate(Ⅳ) by the ferrate(Ⅵ)in the reaction system.The green ferrate(Ⅳ) solution was more stable,and the concentration of ferrate(Ⅳ) was increased with the rising o...