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用邻菲啰啉分光光度法测定两种不同矿源的酸样及曝气处理后磷酸中亚铁离子(Fe~(2+))的含量,研究亚铁离子(Fe~(2+))的含量对磷酸铵颜色的影响。结果表明,曝气能够明显降低磷酸中Fe~(2+)的浓度,使磷酸铵产品的颜色发生变化,解决以往磷酸铵颜色发黑的问题。
The content of ferrous ions (Fe ~ (2+)) in acid samples from two different ore sources and phosphoric acid after aeration treatment was measured by spectrophotometry with phenanthroline. The effects of ferrous ions (Fe ~ (2+)) Effect of content on the color of ammonium phosphate. The results show that aeration can obviously reduce the concentration of Fe2 + in the phosphoric acid and change the color of the ammonium phosphate product, thus solving the problem of the blackening of the ammonium phosphate in the past.