Abstract：The condensation compound after phosphoric acid dehydration had strong acidity and coordination properties. After the samples were dissolved in phosphoric acid by heating at high temperature for 5 min, the titanium and iron was reduced by aluminum sheet and stannous chloride under acid conditions. Then, the content of titanium and iron in ilmenite was respectively determined by potassium dichromate standard solution with neutral red and sodium diphenylamine sulfonate as indicator. The effect of sample dissolution condition, sample size, dissolution time and reducing acidity on determination was investigated to obtain the optimal experimental conditions. The determination results of titanium and iron in actual sample by this method were consistent with those obtained by classical ammonium ferric sulfatemercury salt method, and relative standard deviations (n=5) was smaller than 0.2 % and 0.5 %. This method has been applied into the determination of titanium and iron in ilmenite certified reference materials YSBC1970476 for five times. The results were consistent with the certified values, and relative standard deviations were 0.12 % and 0.62 %, respectively.
刘冠龙 许俊鸿. 重铬酸钾法快速测定钛铁矿中钛铁含量[J]. 冶金分析, 2012, 32(3): 74-76.
LIU Guanlong，XU Junhong*. Rapid determination of titanium and iron in ilmenite by potassium dichromate titrimetry. , 2012, 32(3): 74-76.
