焙烧矿中磷量的测定——铋盐催化磷钼蓝吸光光度法

Determination of Phosphorus in the Bake Ore──The Absorption Spectrometry Catalyzed with Bismuthate Phosphomolybdate Blues

本文采用铋盐催化磷钼蓝吸光光度法测定焙烧矿中磷含量 ,试验结果表明 ,对于五氧化二磷量 10～12 0 μg/ 5 0 m L 的范围内 ,工作曲线呈线性关系。在 6 90 nm处 ,磷钼蓝络合物的摩尔吸光系数为 1.91× 10 4L· mol- 1· cm- 1。方法 RSD<5 %,标准加入回收率为 98.6 4～ 10 5 .5 8%,结果满意。

This paper adopts the colorimetric method of bismuthate catalyzing phosphomolybdate blues to determine the amount of P in the bake ore ,the result of test shows that the work curve is linear relation with P 2O 5 from10～120μg/50mL.At 690 nm pot, the mole absorptivity of phosphorus molybdenum blues complex compound is 1.91×10 4 L·mol -1·cm -1.The RSD is less than 5%.The recovery rate of standard addition is from 98.64% to 105.58%.The result is satisfied.