Abstract：The content of major components (S and TFe) and ten minor components (MgO, Al2O3, SiO2, P, CaO, TiO2, Mn, Cu, Zn and Pb) in pyrite was determined by X-ray fluorescence spectrometry(XRF). The sample fusion preparation technique was used to eliminate the grain-size effect and mineral effect. The optimized fusion conditions were obtained: 0.500 0 g of sample, 7.222 3 g of Li2B4O7 as flux, 3.805 5 g of LiNO3 as oxidizing agent and 0.02 g of NH4I as release agent. The fused Li2B4O7 protection layer on wall was formed to avoid the corrosion of platinum-gold crucible. The pyrite was pre-oxidized at 610 ℃ for 40 min followed by fusion at 1 050 ℃ for 15 min to prepare the sample piece for testing. The matrix effect was corrected by fixed theoretical α influence coefficient method. The precision test was conducted on pyrite certified reference material. The relative standard deviations (RSD) were between 0.51% and 8.0%. The proposed method was applied to the analysis of actual pyrite sample. The results were consistent with those obtained by other methods. The proposed method could not only improve the testing efficiency, but also save the dosage of reagents.
廖海平,付冉冉,任春生,陈贺海,张建波. 熔融制样-X射线荧光光谱法测定硫铁矿中主次成分[J]. 冶金分析, 2014, 34(12): 29-32.
LIAO Hai-ping,FU Ran-ran,REN Chun-sheng,CHEN He-hai,ZHANG Jian-bo. Determination of major and minor components in pyrite by X-ray fluorescence spectrometry with fusion sample preparation. , 2014, 34(12): 29-32.
