Abstract：The accurate and rapid determination of impurities in iron ore has important significance to judge the quality of iron ores. The sample was digested using the method of “acid dissolution-alkali fusion of slag”. The sample was dissolved with hydrochloric acid and nitric acid followed by filtration. The filter residue and filter paper were ashed and then melted with sodium carbonate-boric acid mixed flux. The amount of total dissolved solids (TDS) in solution was 2.5mg/mL. The calibration curve was prepared with matrix matching method to eliminate the influence of matrix effect. The contents of 16 elements (aluminum, arsenic, calcium, chromium, copper, potassium, magnesium, manganese, nickel, phosphorus, lead, silicon, tin, titanium, vanadium and zinc) were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The linear correlation coefficients of calibration curves for testing elements were all higher than 0.999. The detection limits of method were between 0.00018% and 0.034%. The proposed method was applied to the determination of aluminum, arsenic, calcium, chromium, copper, potassium, magnesium, manganese, nickel, phosphorus, lead, silicon, tin, titanium, vanadium and zinc in two actual samples of iron ore. The relative standard deviations (RSD, n=8) of the results were between 0.40% and 9.8%. Four standard samples of iron ore were determined according to the experimental method, and the found results were consistent with the certified values. The contents of aluminum, arsenic, calcium, chromium, copper, potassium, magnesium, manganese, nickel, phosphorus, lead, silicon, tin, titanium, vanadium and zinc in four production samples of iron ore were determined, and the found results were consistent with those obtained by standard methods in GB/T6730 series.
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