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

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.