密闭消解—电感耦合等离子体光谱法测定稀有金属矿选冶流程样品中锂、铍、铌和钽

Inductively Coupled Plasma Atomic Emission Spectrometric Determination of Lithium、Beryllium、Niobium and Tantalum in Sample of Beneficiation Process of Rare Metal Ore after Closed Digestion

这是一篇矿物分析领域的论文。采用盐酸、硝酸、氢氟酸、硫酸于聚四氟乙烯密闭消解罐中加热消解,酒石酸—稀盐酸介质提取,以电感耦合等离子体光谱法同时测定溶液中锂、铍、铌和钽。Li和Be在0~50μg/m L、Nb_(2)O_(5)和Ta_(2)O_(5)在0~100μg/m L范围内呈良好测现性关系,校准曲线相关系数r均大于0.9999,方法检出限分别为0.1μg/g、0.5μg/g、1.0μg/g、0.1μg/g。用于实际样品分析,加标回收率为94.6%~105.6%,锂、铍、铌、钽的相对标准偏差(n=11)分别为1.08%~7.04%、0.65%~13.06%、2.59~7.32%、2.02%~7.60%,用标准样品分析,测定值与认定值相符。

This is an essay in the field of mineral analysis.The ore sample was digested with Hydrochloric acid、nitric acid、hydrofluoric acid、sulfuric acid in a closed polytetrafluoroethylene digestion tank.Hydrochloric acid and tartaric acid medium is used for extraction.The Lithium、Beryllium、niobium and tantalum in the prepared solution were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES).The emission spectral intensity of Lithium、Beryllium、niobium and tantalum showed a good linear relationship withρ(Li) andρ(Be) in the range of 0~50μg/m L、ρ(Nb_(2)O_(5)) andρ(Ta_(2)O_(5)) in the range of 0~100μg/m L.The correlation coefficients of the calibration curve for Lithium、Beryllium、niobium and tantalum were both 0.9999.The detection limits for Lithium、Beryllium、niobium and tantalum were 0.1μg/g、0.5μg/g、1.0μg/g、0.1μg/g,respectively.The proposed method was applied to the determination of the actual sample giving recovery rate of 94.6%~105.6%and the relative standard deviations (RSD n=11) of Lithium、Beryllium、niobium and tantalum are1.08%~7.04%、0.65%~13.06%、2.59~7.32%、2.02%~7.60%,respectively.This method was applied to the analysis of the standard sample and the results were consistent with the certified values.