Rare Earth Element Contents and Occurrence Forms in Weathering Crust Ion Adsorption Rare Earth Ore
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摘要:
风化壳离子吸附型稀土矿床具有稀土元素(REEs)种类齐全、放射性活性低、重稀土含量高，且易开采等特点，是一种极为重要的稀土矿床类型。当前，有关该矿床中稀土元素的测定研究大都只测定了稀土元素全量及离子相分量，且有些方法操作流程较繁琐，对于稀土元素的各种赋存形态分析研究较少。但在研究风化壳离子吸附型稀土矿床的成矿规律时，不仅要分析其稀土元素全量，还需要分析影响该矿床中稀土元素的成矿背景、迁移、富集过程中移动差异性、长期性和可利用性的化学形态，因此，准确测定风化壳离子吸附型稀土矿床中稀土元素全量及各赋存形态含量非常必要。本文以五酸混合消解作为测定风化壳离子吸附型稀土矿样品中稀土元素全量的前处理方法，并将BCR法和Tessier法提取的稀土元素形态结果进行对比，以ICP-MS为检测手段，探讨了样品中稀土元素全量及各赋存形态含量分布情况。结果表明，五酸混合消解能将稀土矿样品中所有稀土元素完全溶出，且操作简便，方法精密度(RSD)为0.82%～5.19%，检出限为0.002～0.027μg/g，各元素测定值与认定值的相对误差为−4.70%～6.65%，∑LREEs/∑HREEs为1.25～16.50，涵盖轻稀土和重稀土富集。BCR法和Tessier法提取的稀土元素各形态结果的相对偏差(RD)为0.79%～8.07%，提取结果基本能相互对应吻合，∑REEs回收率为84.75%～107.13%，∑REEs测定值的相对偏差(RD)为0.62%～21.00%，相对误差(RE)小于40%。相较之下，BCR法前处理流程简单，但是划分的形态没有Tessier法直观、具体，无法获取更详细的各形态数据，在本文实验条件下，Tessier法对于稀土元素形态分析可能具有较好的适应性。风化壳全风化层样品中稀土元素主要以离子吸附态赋存在黏土类矿物表面，因而离子交换态含量最高，随着风化壳剖面深度增加，pH升高，稀土元素更容易与碳酸根或碳酸氢根结合，导致碳酸盐结合态中稀土元素含量增大，Ce元素在该层中极易从Ce3+氧化成Ce4+，以沉淀形式滞留于原地，不同于其他稀土元素分异-富集特征，形成Ce异常；而母岩中的稀土元素主要富集在独立矿物晶格中，残渣态含量最高，各赋存形态下所有稀土元素变化规律基本一致。
Abstract:The weathering crust ion adsorption type rare earth deposit has the characteristics of complete REE types, low radioactivity, high heavy rare earth contents, and easy mining, making it an extremely important type of rare earth deposit. At present, most of the research on the determination of REEs in this deposit only measures the total amount and ionic phase components of REEs, and some methods have complicated operating procedures, while there is relatively little research on the analysis of various REE forms. However, when studying the mineralization laws of weathering crust ion adsorption type rare earth deposits, it is not only necessary to analyze the total amount of REEs, but also to analyze the chemical forms that affect the mineralization background, migration, enrichment process, long-term differences, and availability of REEs in the deposit. Therefore, it is necessary to accurately determine the total amount and contents of various occurrence REE forms in weathering crust ion adsorption type rare earth deposits. In this article, a five acid mixed digestion was used as a pretreatment method for determining the total amount of REEs, and the results of rare earth elements speciation analysis determined by BCR method and Tessier method were compared. ICP-MS was used as the detection method to explore the distribution of the total amount and various REE forms in the samples. The results show that the five-acid mixed digestion can completely dissolve all REEs in the rare earth ore sample, and the operation is simple. The precision (RSD) of this method was between 0.82% to 5.19%, the detection limit was between 0.002g/g to 0.027g/g, and the relative error between the measured value and the recognized value of each element was between −4.70% to 6.65%. The ∑LREEs/∑HREEs was between 1.25 to 16.50, covering the enrichment of light rare earths and heavy rare earths. The relative deviation (RD) of rare earth forms extracted by the two methods of BCR and Tessier was 0.79% to 8.07%, and the extraction results correspond and match each other. The rate of recovery was between 84.75% to 107.13%. The RD of ∑REEs determination values was between 0.62% to 21.00%, and the relative error (RE) was less than 40%. In contrast, the BCR method has a simpler pre-processing flow, but the partitioned forms are not as intuitive and specific as the Tessier method, which cannot be used to obtain more detailed data on each form. Thus, under the conditions of this experiment, the Tessier method may have good adaptability for rare earth form analysis. REEs in the fully weathered layer samples of the weathering crust mainly exist on the surface of clay minerals in the form of ion adsorption, resulting in the highest content of ion exchange state. As the depth of the weathering crust profile increases and the pH rises, REEs are more likely to bind with carbonate or bicarbonate ions, leading to an increase in the rare earth contents in the carbonate bound state. Elemental Ce is easily oxidized from Ce3+to Ce4+ in this layer, and stays in situ in the form of precipitation, resulting in Ce anomaly; REEs in the parent rock are mainly enriched in the independent mineral lattice, with the highest residual content. The variation patterns of all REEs under different occurrence forms are basically consistent.
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表 1 电感耦合等离子体质谱仪工作条件
Table 1. Operating parameters for ICP-MS measurements
工作参数 设定值 工作参数 设定值 射频功率 1300W 扫描次数 40次 冷却气(Ar)流速 13.0L/min 采集方式 跳峰，3点/质量 辅助气(Ar)流速 1.0L/min 停留时间 10ms/点 雾化器气体(Ar)流速 0.85L/min 测量时间 30s 采样锥(镍)孔径 1.0mm 分析室真空度 ≤5.5×10−7mbar 截取锥(镍)孔径 0.7mm 主循环次数 3次 
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表 2 样品野外采集信息
Table 2. Field sampling information of the samples
样品编号 矿区 矿体 样品类型 岩性 采样深度(m) W02 A区 S1 全风化 中粒黑云母二长花岗岩 8～10 W04 B区 S15 全风化 粗中粒二云二长花岗岩 6～8 L01 D区 S3 全风化 中粒二长花岗岩 10～12 L03 D区 S1 全风化 中粒花岗岩 3.8～5.8 L05 D区 S3 母岩 中粗粒黑云母二长花岗岩 地表 L08 D区 S1 母岩 中细粒黑云母二长花岗岩 地表
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表 3 方法精密度、检出限和准确度
Table 3. Precision, detection limit and accuracy tests of the method
稀土元素 GBW07160 GBW07161 GBW07185 空白
(μg/g)检出限
(μg/g)w0
(μg/g)w
(μg/g)RSD
(%)RE
(%)w0
(μg/g)w
(μg/g)RSD
(%)RE
(%)w0
(μg/g)w
(μg/g)RSD
(%)RE
(%)La 93.8±8.5 92.9 1.81 −0.99 2362±145 2372 1.59 0.43 6.52±0.17 6.45 3.57 −1.12 0.24 0.022 Ce 28.3±4.1 27.9 3.17 −1.37 187±8 186 2.34 −0.70 13.4±0.7 13.1 3.07 −2.62 0.31 0.025 Pr (37.2) 36.7 3.58 −1.29 447±25 444 1.75 −0.77 1.58±0.14 1.51 4.59 −4.48 0.033 0.008 Nd 189±17 191 2.26 1.19 1595±86 1586 1.56 −0.55 6.72±0.40 6.79 2.69 1.02 0.12 0.023 Sm 129±17 132 1.66 2.26 285±26 288 1.43 1.18 2.14±0.22 2.18 3.86 1.93 0.017 0.008 Eu 1.55±0.26 1.48 5.04 −4.52 64.8±3.6 66.4 1.76 2.39 0.11±0.03 0.11 5.19 −4.70 0.003 0.003 Gd (234) 236 1.71 0.96 226±26 228 2.05 1.04 3.01±0.26 3.07 3.58 1.97 0.016 0.008 Tb 49.1±5.1 47.8 3.29 −2.56 34.6±2.2 33.7 2.89 −2.63 0.61±0.07 0.62 2.84 1.94 0.003 0.003 Dy 314±44 317 1.16 0.96 183±17 186 1.68 1.76 4.11±0.13 3.98 1.95 −3.22 0.013 0.005 Ho 65.5±5.4 63.9 2.07 −2.42 35.7±4.0 34.7 2.58 −2.83 0.77±0.07 0.75 3.12 −2.11 0.003 0.004 Er 192±26 194 1.37 1.27 96.0±8.7 97.9 1.85 1.93 2.32±0.20 2.38 3.07 2.70 0.006 0.004 Tm 27.7±3.1 27.5 3.47 −0.90 13.2±1.1 12.7 3.04 −3.48 0.33±0.03 0.35 4.89 5.79 0.001 0.002 Yb 193±26 195 0.82 1.26 87.8±10.5 89.0 2.24 1.31 2.08±0.24 2.15 4.19 3.30 0.007 0.006 Lu 26.7±2.6 27.1 3.55 1.42 12.0±0.9 12.3 2.88 2.75 0.33±0.03 0.35 5.04 6.65 0.001 0.002 Y 2386±205 2398 1.69 0.49 976±47 984 1.69 0.86 23.6±0.6 23.7 2.57 0.62 0.077 0.027 注：括号内的数据为参考值。
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表 4 稀土元素全量测定结果
Table 4. Determination results of REEs
稀土元素 W02
(μg/g)RD
(%)W04
(μg/g)RD
(%)L01
(μg/g)RD
(%)L03
(μg/g)RD
(%)L05
(μg/g)RD
(%)L08
(μg/g)RD
(%)La 584 1.07 477 1.40 455 1.60 260 1.26 71.2 1.43 92.1 1.63 Ce 222 2.66 123 3.71 237 1.95 118 3.63 94.3 1.38 179 1.06 Pr 98.4 2.34 96.2 2.08 75.9 4.72 55.4 2.56 16.4 1.83 18.9 3.70 Nd 326 2.82 354 2.75 253 1.35 171 2.98 55.7 1.26 64.5 1.30 Sm 56.4 1.56 91.0 1.87 52.6 4.71 21.5 6.98 9.34 3.00 10.6 2.26 Eu 6.05 4.30 7.41 2.16 5.66 6.71 2.05 5.85 1.22 3.28 1.27 3.15 Gd 35.4 0.34 58.2 0.45 59.1 2.81 11.4 4.39 7.07 1.41 8.59 2.10 Tb 4.30 3.72 8.76 1.14 12.9 6.51 1.08 11.11 1.05 7.62 1.21 6.61 Dy 19.7 1.22 45.3 2.69 80.6 2.70 3.46 4.62 5.64 1.77 6.17 1.62 Ho 3.38 2.37 7.74 1.29 15.6 4.76 0.63 6.35 1.06 3.77 1.11 5.41 Er 9.98 3.81 22.4 5.54 40.7 4.86 2.04 7.84 3.00 7.33 2.92 2.74 Tm 1.39 4.32 3.56 7.30 5.91 3.38 0.27 14.81 0.46 13.04 0.41 9.76 Yb 10.1 2.97 28.2 1.35 37.6 3.30 1.74 2.30 3.15 3.81 2.64 2.27 Lu 1.22 8.20 3.39 5.90 4.59 6.54 0.24 8.33 0.39 10.26 0.32 12.50 Y 83.1 0.91 245 0.85 608 1.43 17.2 5.58 28.7 0.84 29.5 1.02 ∑REEs 1462 0.79 1571 0.22 1944 0.63 666 0.64 299 0.20 420 1.25 ∑LREEs 1293 0.91 1149 0.12 1079 2.02 628 0.53 248 0.08 367 1.40 ∑HREEs 169 0.14 422 1.14 865 1.10 38.0 2.52 50.6 1.58 52.9 0.19 ∑LREEs/∑HREEs 7.67 2.72 1.25 16.50 4.91 6.93
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表 5 BCR法稀土元素分步提取结果(n=2)
Table 5. Determination results of REE sequential extraction for BCR method
样品
编号形态
代号La
(μg/g)Ce
(μg/g)Pr
(μg/g)Nd
(μg/g)Sm
(μg/g)Eu
(μg/g)Gd
(μg/g)Tb
(μg/g)Dy
(μg/g)Ho
(μg/g)Er
(μg/g)Tm
(μg/g)Yb
(μg/g)Lu
(μg/g)Y
(μg/g)∑REEs
(μg/g)RD
(%)REEs
回收率
(%)W02 F1 510 24.5 75.0 249 41.7 4.01 27.0 3.14 14.0 2.39 7.52 0.90 7.14 0.79 66.2 1033 2.47 85.63 F2 1.17 10.0 0.31 1.35 0.26 0.02 0.25 0.03 0.17 0.02 0.04 0.01 0.07 0.01 0.25 14.0 3.14 F3 4.69 34.9 1.69 5.49 1.53 0.12 0.88 0.11 0.54 0.08 0.28 0.05 0.47 0.05 1.99 52.8 5.15 F4 8.69 125 1.78 6.59 1.48 0.57 1.52 0.16 0.85 0.14 0.52 0.07 0.61 0.08 3.25 151 2.83 合量 525 194 78.8 262 44.5 4.72 29.7 3.44 15.6 2.63 8.36 1.03 8.29 0.93 71.7 1251 1.95 W04 F1 382 10.2 67.6 251 63.9 5.44 40.8 5.17 24.2 4.03 11.7 1.49 12.3 1.47 101 982 2.03 84.88 F2 0.91 6.48 0.28 1.04 0.29 0.04 0.25 0.03 0.24 0.03 0.08 0.02 0.21 0.02 0.34 10.3 6.21 F3 3.66 19.0 1.52 5.44 1.91 0.21 1.04 0.14 0.90 0.17 0.38 0.07 0.71 0.08 2.42 37.7 4.56 F4 30.9 87.0 7.69 27.2 6.77 0.35 6.44 1.68 11.96 2.38 7.69 1.36 10.9 1.22 99.3 303 3.47 合量 417 123 77.1 285 72.9 6.04 48.5 7.02 37.3 6.61 19.9 2.94 24.1 2.79 203 1333 0.62 L01 F1 410 5.92 63.3 213 43.6 4.19 47.0 11.0 64.1 11.7 34.6 5.08 29.5 3.69 645 1591 1.72 101.64 F2 8.15 5.96 2.35 7.51 1.95 0.22 1.95 0.49 3.19 0.67 1.85 0.29 2.11 0.25 13.1 50.0 1.24 F3 16.0 12.1 4.38 14.1 3.14 0.31 3.29 0.89 5.21 1.24 3.14 0.44 3.35 0.41 30.1 98.0 2.82 F4 3.66 214 0.96 3.11 0.76 0.31 1.85 0.28 1.49 0.29 1.05 0.19 1.51 0.22 6.98 237 3.00 合量 438 238 71.0 238 49.5 5.03 54.1 12.7 74.0 13.9 40.6 6.00 36.5 4.57 695 1976 1.64 L03 F1 201 20.1 43.7 124 14.6 1.38 7.51 0.72 1.89 0.34 1.22 0.11 0.89 0.11 9.88 427 1.98 84.75 F2 5.48 4.31 1.44 5.48 0.91 0.07 0.69 0.14 0.78 0.15 0.39 0.05 0.39 0.05 3.33 23.7 4.05 F3 9.77 10.1 2.77 10.2 1.49 0.12 0.89 0.13 0.63 0.10 0.34 0.05 0.41 0.05 3.35 40.4 5.69 F4 5.44 60.4 1.00 3.21 0.46 0.07 0.66 0.05 0.24 0.05 0.09 0.02 0.10 0.02 0.91 72.7 4.24 合量 222 94.9 48.9 142.9 17.5 1.64 9.75 1.04 3.54 0.64 2.04 0.23 1.79 0.23 17.5 564 0.71 L05 F1 23.1 5.55 6.35 22.2 3.28 0.34 2.34 0.34 1.47 0.24 0.68 0.07 0.55 0.05 7.56 74.1 3.81 107.13 F2 14.1 10.1 3.44 12.0 2.24 0.24 1.54 0.37 1.24 0.26 0.65 0.07 0.66 0.08 6.44 53.4 2.77 F3 8.00 8.44 2.24 7.34 1.21 0.11 0.79 0.12 0.62 0.13 0.24 0.04 0.31 0.03 3.44 33.1 7.98 F4 28.1 75.7 6.44 21.2 3.69 0.66 3.04 0.49 2.85 0.58 1.55 0.29 1.77 0.19 12.9 159 4.16 合量 73.3 99.8 18.5 62.7 10.4 1.35 7.71 1.32 6.18 1.21 3.12 0.47 3.29 0.35 30.3 320 3.32 L08 F1 8.44 12.3 2.11 5.57 0.55 0.04 0.44 0.05 0.29 0.04 0.09 0.01 0.08 0.01 1.38 31.4 6.94 104.51 F2 6.44 12.4 1.49 7.14 1.59 0.09 1.35 0.25 1.34 0.19 0.55 0.08 0.49 0.06 7.04 40.5 4.74 F3 5.49 8.44 1.17 3.74 0.59 0.04 0.41 0.05 0.32 0.05 0.14 0.02 0.16 0.02 2.08 22.7 6.61 F4 71.4 158.3 14.2 49.7 7.88 1.19 6.25 0.95 4.69 0.88 2.38 0.35 2.24 0.29 23.2 344 1.92 合量 91.8 191 19.0 66.2 10.6 1.36 8.45 1.30 6.64 1.16 3.16 0.46 2.97 0.38 33.7 439 1.79 注：回收率为各形态分析步骤合量与稀土元素全量之比百分数。
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表 6 Tessier法稀土元素分步提取结果(n=2)
Table 6. Determination results of REE sequential extraction for Tessier method
样品
编号形态
代号La
(μg/g)Ce
(μg/g)Pr
(μg/g)Nd
(μg/g)Sm
(μg/g)Eu
(μg/g)Gd
(μg/g)Tb
(μg/g)Dy
(μg/g)Ho
(μg/g)Er
(μg/g)Tm
(μg/g)Yb
(μg/g)Lu
(μg/g)Y
(μg/g)∑REEs
(μg/g)RD
(%)∑REEs
回收率
(%)W02 T1 16.9 0.23 2.95 10.4 2.37 0.22 1.70 0.23 1.09 0.18 0.50 0.07 0.42 0.05 5.18 42.5 4.28 90.45 T2 467 17.3 52.6 163 18.9 1.74 15.4 1.39 4.72 0.85 2.56 0.23 1.27 0.15 34.6 782 1.21 T3 55.1 8.92 24.6 92.0 25.2 2.60 13.5 2.00 10.0 1.69 5.08 0.78 6.13 0.73 33.0 281 2.69 T4 3.19 4.80 1.15 3.95 1.04 0.10 0.58 0.08 0.45 0.08 0.24 0.04 0.36 0.04 1.45 17.6 3.18 T5 1.12 9.82 0.35 1.26 0.28 0.02 0.21 0.03 0.13 0.02 0.07 0.01 0.09 0.01 0.27 13.7 3.21 T6 1.62 30.1 0.51 1.75 0.40 0.04 0.40 0.04 0.17 0.03 0.09 0.01 0.14 0.02 0.32 35.6 4.15 T7 8.54 123 1.91 6.44 1.44 0.47 1.55 0.19 0.96 0.16 0.47 0.08 0.68 0.09 3.06 149 2.89 合量 553 194 84.1 279 49.6 5.19 33.3 3.96 17.5 3.01 9.01 1.22 9.09 1.09 77.9 1321 1.94 W04 T1 25.6 0.76 4.00 13.5 2.50 0.24 1.88 0.24 1.14 0.20 0.54 0.07 0.44 0.05 5.73 56.9 3.23 89.70 T2 348 3.47 46.5 162 28.3 2.28 21.5 2.26 8.74 1.50 4.10 0.45 2.67 0.33 59.2 691 2.41 T3 42.6 7.87 23.3 94.6 37.6 3.33 19.9 3.31 16.8 2.57 7.45 1.29 10.9 1.29 43.8 317 1.71 T4 2.31 2.73 1.01 3.93 1.45 0.13 0.78 0.14 0.72 0.11 0.34 0.06 0.59 0.07 1.95 16.3 2.21 T5 0.87 6.63 0.30 1.18 0.38 0.04 0.26 0.04 0.21 0.03 0.10 0.02 0.17 0.02 0.37 10.6 5.09 T6 1.21 15.4 0.37 1.39 0.40 0.04 0.32 0.04 0.21 0.03 0.10 0.02 0.17 0.02 0.41 20.1 4.18 T7 30.0 84.6 7.59 27.0 6.95 0.32 6.64 1.61 11.7 2.40 7.56 1.31 10.6 1.30 97.3 297 1.58 合量 451 121 83.1 304 77.6 6.38 51.3 7.64 39.5 6.84 20.2 3.22 25.5 3.08 209 1409 1.49 L01 T1 0.04 0.02 0.01 0.03 0.01 0.00 0.01 0.00 0.01 0.00 0.01 0.00 0.00 0.00 0.07 0.21 8.60 102.68 T2 334 3.19 36.2 113 16.1 1.58 21.76 3.82 21.6 4.55 11.0 1.21 5.55 0.71 314 888 0.80 T3 85.2 2.96 29.9 107 28.7 3.08 29.59 7.42 48.3 9.18 24.7 3.78 25.3 3.10 328 736 0.86 T4 11.9 1.85 3.36 11.41 2.81 0.30 2.72 0.70 4.64 0.89 2.44 0.40 2.88 0.35 27.2 73.9 2.03 T5 7.98 5.76 2.12 7.36 1.72 0.19 1.82 0.46 3.11 0.62 1.67 0.26 1.90 0.23 12.7 47.9 3.80 T6 3.38 9.28 0.88 3.09 0.70 0.07 0.72 0.16 1.05 0.20 0.55 0.09 0.66 0.08 4.63 25.5 2.81 T7 3.54 203 0.89 2.90 0.73 0.27 1.67 0.21 1.40 0.29 0.95 0.18 1.36 0.17 6.72 224 2.10 合量 446 226 73.4 245 50.8 5.49 58.3 12.8 80.1 15.7 41.3 5.92 37.7 4.64 693 1996 0.64 L03 T1 0.01 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 11.27 87.67 T2 168 14.0 28.6 56.4 4.88 0.41 3.39 0.28 0.67 0.12 0.41 0.03 0.14 0.02 4.06 281 3.37 T3 35.4 8.71 15.8 70.1 10.9 1.02 4.44 0.55 1.34 0.27 0.85 0.12 0.86 0.11 6.16 157 2.94 T4 5.72 1.80 1.87 6.47 0.99 0.09 0.42 0.05 0.24 0.04 0.13 0.02 0.13 0.01 1.04 19.0 5.89 T5 5.79 4.54 1.65 5.78 0.96 0.10 0.75 0.15 0.85 0.16 0.43 0.06 0.45 0.05 3.43 25.2 4.22 T6 4.21 9.49 1.10 3.88 0.63 0.06 0.53 0.09 0.52 0.09 0.28 0.04 0.29 0.04 2.54 23.8 2.77 T7 5.73 64.3 1.04 3.40 0.60 0.09 0.73 0.07 0.28 0.05 0.13 0.02 0.15 0.02 0.95 77.6 3.92 合量 225 103 50.1 146 19.0 1.77 10.3 1.19 3.90 0.73 2.23 0.29 2.02 0.25 18.2 584 3.42 L05 T1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 21.00 103.85 T2 5.32 0.38 0.81 2.55 0.28 0.02 0.24 0.02 0.09 0.01 0.04 0.00 0.01 0.00 0.64 10.4 4.04 T3 17.7 5.21 5.31 18.4 2.98 0.28 1.92 0.26 1.20 0.21 0.56 0.07 0.48 0.06 6.71 61.4 3.13 T4 5.23 2.30 1.34 4.65 0.77 0.07 0.47 0.07 0.35 0.06 0.16 0.02 0.15 0.02 1.97 17.6 2.84 T5 13.3 9.67 3.35 11.5 2.13 0.22 1.58 0.26 1.30 0.23 0.59 0.09 0.59 0.07 6.32 51.2 3.59 T6 2.88 6.27 0.79 2.83 0.53 0.05 0.39 0.06 0.34 0.06 0.17 0.03 0.19 0.02 1.66 16.3 3.19 T7 26.9 73.1 6.23 20.3 3.52 0.62 2.88 0.45 2.62 0.52 1.48 0.24 1.69 0.21 12.7 153 3.29 合量 71.3 96.9 17.8 60.2 10.2 1.26 7.48 1.12 5.90 1.09 3.00 0.45 3.11 0.38 30.0 310 1.79 L08 T1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14.10 102.96 T2 1.23 0.09 0.21 0.72 0.06 0.01 0.07 0.01 0.03 0.00 0.01 0.00 0.00 0.00 0.21 2.65 8.30 T3 7.06 11.2 1.50 4.72 0.56 0.04 0.45 0.05 0.22 0.04 0.10 0.01 0.09 0.01 1.11 27.2 3.99 T4 1.07 1.63 0.24 0.69 0.09 0.01 0.07 0.01 0.04 0.01 0.03 0.00 0.02 0.00 0.22 4.13 7.28 T5 6.52 12.8 1.84 7.37 1.74 0.10 1.39 0.23 1.29 0.23 0.59 0.08 0.54 0.07 7.15 41.9 2.96 T6 4.49 7.06 0.98 3.30 0.55 0.04 0.40 0.06 0.31 0.05 0.14 0.02 0.13 0.02 1.99 19.5 3.59 T7 69.7 157 13.9 47.5 7.74 1.14 6.09 0.89 4.52 0.82 2.20 0.31 2.03 0.23 22.7 337 2.03 合量 90.1 190 18.7 64.3 10.7 1.34 8.47 1.25 6.41 1.15 3.07 0.42 2.81 0.33 33.4 432 2.40 注：回收率为各形态分析步骤合量与稀土元素全量之比百分数。
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