Abstract：Vanadium-titanium magnetite is an important raw material for steel making. The vanadium and titanium elements have very high comprehensive utilization value. There are many methods for the detection of vanadium and titanium, wherein chemical wet method is complicated. The additional sample dissolving equipment is required for the determination by inductively coupled plasma atomic emission spectrometry (ICP-AES) after sample treatment by microwave digestion, so the cost is high. The sample was firstly fused with boric acid-sodium carbonate mixed flux at 1 000 ℃ followed by leaching with hydrochloric acid. V 309.311 nm and Ti 334.941 nm were selected as the analytical lines. The matrix matching method was used to prepare the calibration curve to eliminate the influence of matrix effect. The contents of vanadium and titanium in vanadium-titanium magnetite were determined by ICP-AES. The linear correlation coefficients of calibration curves for vanadium and titanium were both higher than 0.999. The limits of detection of method were both 0.000 5%. The contents of vanadium and titanium in national standard samples of vanadium-titanium magnetite (GBW07225, GBW07226a and GBW07227) were determined according to the experimental method. The relative standard deviations (RSD, n=7) of measurement results were less than 4%. The found results were consistent with the certified values. Three actual samples of vanadium-titanium magnetite were determined according to the experimental method, and the results were consistent with those obtained by national standard methods (GB/T 6730.31-2017 Determination of vanadium by spectrophotometry, and GB/T 6730.23-2006 Determination of titanium by titration).
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