电感耦合等离子体原子发射光谱法测定铁矿中全铁

用四硼酸钠-碳酸钠混合熔剂熔融铁矿,用稀盐酸浸出.选择较高稳定性且无光谱干扰的Fe 248.327nm为分析线,加入钇为内标元素,Y 371.030nm为内标线,检测铁矿中的总铁。分析的相对标准偏差(RSD,n=7)为0.29%～0.39%,有证标准物质分析结果同证书值相对误差值均在0.3%以内。

Determination of Iron in Iron Ore by Inductively Coupled Plasma Atomic Emission Spectrometry

Iron ore was decomposed by fusion with sodium carbonate-sodium tetraborate mixture flux,and the melt cake was then dissolved with hydrochloric acid.Fe248.327 nm was selected as the spectral line of iron uninfluenced by other elements,and the Fetotal in iron ore was determined with internal standard method.The relative standard deviations were in the range of 0.29% to 0.39%(n=7).Accuracy of the method was verified by the determination of certificated standard materials of iron ores.Relative error between the analytical results and the certificated values was less than 0.3%.