| 电感耦合等离子体发射光谱法测定铝土矿样品中镓三种前处理方法的比较 |
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| 引用本文： | 杨载明.电感耦合等离子体发射光谱法测定铝土矿样品中镓三种前处理方法的比较[J].岩矿测试,2011,30(3):315-317. |
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| 作者姓名： | 杨载明 |
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| 作者单位： | 贵州省地质矿产勘查开发局一○六地质大队,贵州遵义,563000 |
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| 摘 要： | 采用四酸(盐酸-硝酸-氢氟酸-高氯酸)溶矿、三酸(氢氟酸-硝酸-硫酸)溶矿及氢氧化钠碱熔法3种前处理方法对铝土矿样品进行分解,电感耦合等离子体发射光谱法(ICP-AES)测定样品中的镓。结果表明,四酸溶矿法的分解产物中存在较多的不溶物,镓与盐酸生成GaCl3导致挥损,镓的测定结果严重偏低;三酸溶矿法的分解产物中也存在较多的不溶物,导致测定结果严重偏低;氢氧化钠碱熔法处理铝土矿样品,酸化后所得溶液清澈透明,由于大量NaCl的存在,镓不会挥损,测定值准确度高。采用氢氧化钠碱熔,盐酸酸化提取,ICP-AES法测定镓的准确度高,精密度好,方法检出限为3.21μg/g,相对标准偏差(RSD,n=11)小于5%。经国家一级和二级标准物质分析验证,测定结果与标准值基本一致。
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| 关 键 词： | 镓 铝土矿 样品分解 电感耦合等离子体发射光谱法 |
| 收稿时间： | 5/9/2010 12:00:00 AM |
| 修稿时间： | 9/6/2010 12:00:00 AM |
The Comparison of Three Sample Pretreatment Methods in Determination of Gallium in Bauxite Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry |
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| YANG Zai-ming.The Comparison of Three Sample Pretreatment Methods in Determination of Gallium in Bauxite Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry[J].Rock and Mineral Analysis,2011,30(3):315-317. |
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| Authors: | YANG Zai-ming |
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| Institution: | YANG Zai-ming(No.106 Geological Team,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Zunyi 563000,China) |
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| Abstract: | The bauxite ores were digested by three different pretreatments as HCl-HNO3-HF-HClO4 mixed acids,HF-HNO3-H2SO4 mixed acids and alkali fusion.The Ga was measured by Inductively Coupled Plasma-Atomic Emission Spectrometry(ICP-AES).The HCl-HNO3-HF-HClO4 mixed acids incompletely dissolved the bauxite ores with a large amount of residues.Due to the Ga reacts with HCl to form GaCl3 which is easy to volatilize from the solution system,the measured Ga concentration is much lower than the certified value.The bauxite... |
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| Keywords: | gallium aluminum ore sample decomposition inductively coupled plasma-atomic emission spectrometry |
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