常压混酸溶矿一电感耦合等离子体发射光谱法测定铌钽

混酸溶解矿石样品，在酒石酸介质中，用电感耦合等离子体发生光谱法(ICP-AES)测定溶液中的铌钽。该方法ρ(Nb₂O₅)和ρ(Ta₂O₅)在0～20 μg/mL时，铌钽原子发射光谱强度与浓度呈良好的直线关系，Nb、Ta标准曲线相关系数尺分别为0.999 9和0.999 7。检出限分别为0.023 μg/mL和0.072 μg/mL。本方法测定标准样品，测定值与认定值相符。对实际样品分析，Nh、Ta的相对标准偏差(n=6)分别为0.42％～2.3％和1.8％～3.3％，加标回收率均为97％～103％，适合地质找矿、选冶等领域的样品测试。

Dissolution with mixed acids under normal pressure-determination of niobium and tantalum by inductively coupled plasma atomic emission spectrometric

The ore samples were dissolved by mixed acids and then determined the niobium and tantalum in tartaric acid by inductively coupled plasma atomic emission spectrometry （ICP- AES）. The emission spectral intensity of niobium and tantalum showed linear relationship with the concentration when p （ Nb2O5 ） and p （ Ta2O5 ） in the range of 0 - 20 μg/mL and the correlation coefficients of calibration curve for niobium and tantalum were 0. 999 9 and 0. 999 7. The detection limits for niobium and tantalum were 0. 023 μg/mL and 0. 072 μg/mL. The method was applied to the analysis of standard sample, and the results were consistent with the certified values. The relative standard deviations （RSD, n = 6） were 0.42% -2. 3% and 1.8% - 3.3% for niobium and tantalum, and the recovery rate was 97% - 102% to actual samples. The method is suitable for sample test in geological prospecting and metallurgy.