X射线荧光光谱法测定铁矿石中全铁及18个次量成分

采用X射线荧光光谱法测定铁矿石中主量成分（TFe）及18个次量成分（P、SiO2、Al2O3、CaO、MgO、Mn、TiO2 、V2O5、K2O、S、Cr2O3、Ni、Co、Zn、Pb、Cu、Na2O、As）。以固定理论α影响系数法校正基体效应,使各成分的适用检测范围都得到较大拓宽；采用熔融方法制样，消除了试样的粒度效应和矿物效应。为了避免S的损失，样品经预氧化后灼烧，由软件计算或准确测定样品的烧失量。精密度试验表明，各成分的标准偏差（SD）为0.001%～0.268%。方法用于铁矿石实际样品分析，结果与其他方法结果相吻合。

Determination of total iron and eighteen minor components in iron ore by X-ray fluorescence spectrometry

The contents of total iron (TFe) and eighteen minor components including P、SiO2、Al2O3、CaO、MgO、Mn、TiO2 、V2O5、K2O、S、Cr2O3、Ni、Co、Zn、Pb、Cu、Na2O and As were determined by X-ray spectrometry. The matrix effect was corrected by fixed theoretica1 α influence coefficient method. Consequently, the measuring ranges of components were broadened obviously. The preparation of sample by fusion eliminated the granularity and mineral effects of sample. The loss of S was avoided by the ignition of sample after pre-oxidation. The loss on ignition of sample was calculated using software or determined accurately. The precision test showed that the standard deviations (SDs) were 0.001 %-0.268 %.The proposed method was applied to the analysis of actual iron ore sample, and the results were consistent with those obtained by other methods.