波长色散X射线荧光光谱法同时测定钒渣中的主次量成分

Simultaneous Determination of Major and Minor Components in Vanadium Slag by Wavelength Dispersive X-ray Fluorescence Spectrometry

摘要: 采用偏硼酸锂和四硼酸锂混合熔剂熔融法制样,波长色散X射线荧光光谱法同时测定钒渣中的Al₂O₃、SiO₂、CaO、TiO₂、MnO、P、V₂O₅、MgO、Fe、S、Cr₂O₃等11个主、次量成分。研究了熔剂、预氧化条件、熔样温度、脱模剂等对制样的影响。采用理论α系数校正基体效应及谱线重叠干扰的影响。测定钒渣试样各组分的相对标准偏差(RSD,n=10)在0.1%~7.5%。用钒渣行业级有证标准物质及实际样品验证,测定结果与标准值及其他方法的测定值相符。与化学法相比,该方法具有快速、简便,精密度好,准确度高等优点。

Abstract: A method for simultaneous determination of major and minor components in vanadium slag samples was provided by using lithium metaborate-lithium tetraborate fusion sample and wavelength dispersive X-ray fluorescence spectrometry.The factors affecting the determination such as flux, pre-oxidation, fusion temperature and release agent were studied in details in this paper. The matrix effect is corrected by the theoretical alpha coefficients. This method has been applied to the standard materials with a RSD of 0.1%-7.5%, and the determination results were consistent with the results obtained by other methods. Compared with classical chemical methods, this method has the advantages of higher accuracy, precision, and more efficiency.