Determination of 5 Elements in Ferrotitanium by X-Ray Fluorescence Spectrometry with Melting Method for Sample Preparation

Lithium tetraborate(4.000 0±0.000 1) g was weighted in a platinum alloy crucible and melted at 950℃ to form a waxy protective film on the inner wall of the crucible. Then 1.000 0 g of anhydrous lithium tetraborate, 0.500 0 g of barium peroxide, 0.500 0 g of lithium carbonate and 0.100 0 g of ferrotitanium were added into the treated platinum alloy crucible and mixed well. 2.000 0 g of anhydrous lithium tetraborate was added to cover the surface, and 0.35 mL of 1 000 g·L^-1 lithium bromide solution was added along the reagent, and then sample preparation was carried our by melt method. The calibration curves were established using 5 CRMs of ferrotitanium and 2 calibration samples prepared with high purity iron powder and CRMs, to determine the contents of titanium, silicon, manganese, aluminum and phosphorus in ferrotitanium. Ti K_α was selected as analysis spectral line, and Ba was used as an internal standard for calibration of titanium. Empirical coefficient method and theoretical α-factor method were used to correct the matrix interferrence and spectral line interferrence to silicon, aluminum and phosphorus. The proposed method was applied to the analysis of ferrotitanium samples, giving results in consistency with the results obtianed by the wet-chemical method, and RSDs (n=11) ranged from 0.24% to 4.7%.