Spectroscopy and Spectral Analysis, Volume. 42, Issue 10, 3130(2022)
Matrix Separation-Determination of Rare Earth Oxides in Bauxite by Inductively Coupled Plasma-Atomic Emission Spectrometry
Figures & Tables(7)
Table 1. The investigation of amount of sample and flux
View tableView in ArticleTable 1. The investigation of amount of sample and flux
编号 赤泥/g 氢氧化钠/g 溶解状况 1 0.25 4.0 溶清, Pr6O11相对标准偏差稍大 2 0.25 5.0 溶清, Pr6O11相对标准偏差稍大 3 0.25 6.0 溶清, Pr6O11相对标准偏差稍大 4 0.25 7.0 溶清, Pr6O11相对标准偏差稍大 5 0.50 4.0 赤泥覆盖不完全 6 0.50 5.0 溶清 7 0.50 6.0 溶清 8 0.50 7.0 试样和熔剂溢出坩埚 9 1.0 4.0 后续过滤和洗涤困难 10 1.0 5.0 后续过滤和洗涤困难 11 1.0 6.0 后续过滤和洗涤困难 12 1.0 7.0 后续过滤和洗涤困难
Table 2. Spectral line of rare earth elements
View tableView in ArticleTable 2. Spectral line of rare earth elements
元素 波长/nm 元素 波长/nm La 408.6 Nd 406.1 Ce 418.6 Sc 361.3 Pr 410.0 Y 377.4
Table 3. Changes of content of rare earth oxides before and after separation of matrix/μg·mL-1
View tableView in ArticleTable 3. Changes of content of rare earth oxides before and after separation of matrix/μg·mL-1
基体 La2O3 CeO2 Pr6O11 Nd2O3 Sc2O3 Y2O3 / 0.20 1.00 0.20 0.20 0.20 0.20 1 500 μg·mL-1 Fe2O3 0.12 0.86 0.15 0.17 0.18 0.18 3 500 μg·mL-1 Al2O3 0.15 0.75 0.14 0.16 0.19 0.18 10 μg·mL-1 Fe2O3 0.21 1.10 0.21 0.20 0.19 0.18 20 μg·mL-1 Al2O3 0.21 1.20 0.20 0.22 0.20 0.19
Table 4. Linear equation, correlation coefficient and detection limit
View tableView in ArticleTable 4. Linear equation, correlation coefficient and detection limit
稀土
氧化物线性方程 相关
系数检出限
/%测定下
限/%La2O3 y=51.91x+0.85 0.999 9 0.000 8 0.002 7 CeO2 y=8.35x+0.097 0.999 9 0.001 0 0.003 3 Pr6O11 y=7.35x+0.22 0.999 9 0.001 2 0.004 0 Nd2O3 y=7.39x-0.32 0.999 9 0.001 5 0.005 0 Sc2O3 y=176.63x-0.58 1.000 0 0.000 2 0.000 5 Y2O3 y=22.40x-0.51 0.999 9 0.000 2 0.000 5
Table 5. Precision and recovery rate tests of the method
View tableView in ArticleTable 5. Precision and recovery rate tests of the method
稀土
氧化物本底值
/mgRSD
/%加标量
/mg测定总量
/mg回收率
/%La2O3 0.038 3.5 0.020 0.058 102.5 CeO2 0.085 3.2 0.050 0.13 98.0 Pr6O11 0.021 6.5 0.010 0.030 92.7 Nd2O3 0.036 7.2 0.020 0.053 85.0 Sc2O3 0.034 2.5 0.020 0.054 100.0 Y2O3 0.032 3.1 0.020 0.053 105.0
Table 6. Analytical results of rare earth oxide in red mud
View tableView in ArticleTable 6. Analytical results of rare earth oxide in red mud
测定方法 La2O3 CeO2 Pr6O11 Nd2O3 Sc2O3 Y2O3 ICP-OES/% 0.007 5 0.017 0.004 1 0.007 2 0.006 8 0.006 3 ICP-MS/% 0.007 7 0.018 0.004 5 0.007 8 0.006 6 0.006 1 相对误差/% 2.67 5.88 9.76 8.33 2.94 3.17
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Xuan HU, Zi-hui CHENG, Shu-chao ZHANG, Lei SHI. Matrix Separation-Determination of Rare Earth Oxides in Bauxite by Inductively Coupled Plasma-Atomic Emission Spectrometry[J]. Spectroscopy and Spectral Analysis, 2022, 42(10): 3130
Paper Information
Category: Research Articles
Received: May. 27, 2021
Accepted: Mar. 28, 2022
Published Online: Nov. 23, 2022
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