氢化物发生-电加热原子吸收光谱法测定铁精矿中砷

Determination of the Arsenic in Iron Ore Concentrate by the Hydride Generation-Electric Heating Atomic Absorption Spectrometry

本文研究了采用过氧化钠溶解铁精矿,经水浸取,硫酸酸化后用氢化物技术将痕量的砷从铁精矿中分离、富集,用碘化钾、抗坏血酸和酒石酸作还原剂和掩蔽剂测定铁精矿中的砷。用标准加入电加热原子吸收光谱法消除基体效应,该方法具有灵敏度高,干扰少、快速、准确度高等优点。

The method of determination of arsenic in iron ore concentrate was studied. The method included solving the iron ore concentrate with sodium peroxide, water extraction, sulfuric acid acidification; separation and enrichment of the Iraee arsenic in the iron ore concentrate with the hydride technique and taking potassium iodide, aseorbie acid and tartaric acid as the reducing agents and the screening agents. The matrix effects were eliminated with the standard adding-electric heating atomic absorption spectrometry. This method had the advantages of high sensitivity, less interference, rapid testing and high accuracy.