原子吸收分光光度法测定矿石中氧化镁的干扰研究

Study on Interference Elements in the Determination of Magnesium Oxide Content in Ore by Atomic Absorption Spectrophotometry

本法主要研究使用火焰原子分光光度法测定矿石中氧化镁含量过程中的干扰。分别验证了含二氧化硅、三氧化二铝、氧化钠、氧化钾这四种元素在不同浓度下,实验条件中不加入掩蔽剂(氯化锶)时,对氧化镁检测的干扰。验证了随着浓度的增大,硅元素对氧化镁测定产生负干扰,铝对氧化镁的测定产生正干扰,钾对氧化镁的测定产生正干扰,钠对氧化镁的测定产生正干扰,同时也验证了氯化锶对这四种元素均有很好的掩蔽效果。

In this paper, we mainly study the interference of atomic absorption spectrophotometry in the determination ofmagnesium oxide content in ore. We study the four elements of silicon, aluminum, sodium and potassium. The interference ofmagnesium oxide was measured at different concentrations and without masking agent. Experiments show that with the increase ofconcentration, Silicon element on the determination of magnesium oxide generated negative interference, Aluminum has a positiveinterference with the determination of magnesium oxide ,Potassium has a positive effect on the determination of magnesium oxide,Sodium has a positive effect on the determination of magnesium oxide, It is also verified that strontium chloride has a good maskingeffect on these four elements.