火焰发射光谱法测定锂辉石中锂

Flame Emission Spectrometric Determination of Lithium in Spodumene

摘要: 样品用氢氟酸-高氯酸混合酸消解处理，用火焰原子发射法测定锂辉石中的锂含量。结果显示，在1％（体积分数）的硝酸介质中，空气压力0.3 MPa、乙炔流量1.2 L/min的条件下测定，100倍量的钾、钠、钙、钡、锶等共存元素不干扰测定。方法回收率为94.0％～106.0％，精密度（RSD）小于2％（n=10）。

Abstract: A method for the determination of lithium in spodumene by flame emission spectrometry was reported in this paper. Samples were digested with HFHClO4 mixed acid and lithium in the sample solution was determined by emission spectrometry. The results showed that in the 1% HNO3(V/V) media and at the air pressure of 0.3 MPa with acetylene flow rate of 1.2 L/min, 100 times of coexistent elements of K, Na, Ca, Ba, Sr did not interfere with determination. The standard addition recovery of the method was 94.0%～106.0% with precision of 1.52%RSD(n=10).