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本文采用火焰原子吸收光谱法(FAAS)测定了铜锰复合氧化物在不同浸取体系中Li、Cu、Mn组分的溶解洗出率。Li、Cu、Mn等三种元素的吸光度与浓度之间呈良好线性关系,所得线性回归方程线性相关系数均大于0.99,满足分析要求。盐酸浸取铜锰和锂铜锰氧化物时,虽然其中Li/Cu/Mn为1/1/2,对Li为高比例选择性浸出,对铜的浸出率也较高,即对锂铜锰复合氧化物中的Li、Cu能够选择性浸出;氨水对铜锰氧化物中的铜也是较高比例的选择性浸出,但随焙烧温度提高明显下降。实验测定值的RSD值介于0.14~2.68%之间,表明测定结果准确可靠。
In this paper, flame atomic absorption spectrometry (FAAS) was used to determine the dissolution rate of Cu, Mn and Mn in copper-manganese composite oxides. The linear relationship between the absorbance and the concentration of Li, Cu, Mn and other elements showed a linear relationship, and the linear regression coefficients of the linear regression coefficients were all greater than 0.99, which satisfied the analytical requirements. Hydrochloric acid leaching of copper and manganese and lithium copper manganese oxide, although Li / Cu / Mn is 1/1/2, Li is a high proportion of selective leaching, the leaching rate of copper is higher, that is, lithium copper manganese Li and Cu in the composite oxides can be selectively leached. Ammonia is also a selective leaching of copper in the copper-manganese oxide, but it decreases with the increase of calcination temperature. The RSD values of the experimental values ranged from 0.14 to 2.68%, indicating that the determination results are accurate and reliable.