| K比例H点标准加入吸光光度法同时测定矿样中铌和钽 |
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| 引用本文： | 陶慧林,朱仕毅,郑省政.K比例H点标准加入吸光光度法同时测定矿样中铌和钽[J].岩矿测试,2010,29(6):703-706. |
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| 作者姓名： | 陶慧林 朱仕毅 郑省政 |
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| 作者单位： | 桂林理工大学化学与生物工程学院, 广西 桂林 541004;桂林理工大学化学与生物工程学院, 广西 桂林 541004;桂林理工大学化学与生物工程学院, 广西 桂林 541004 |
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| 基金项目： | 广西壮族自治区教育厅科研基金项目资助 |
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| 摘 要： | 从样品分解方法入手,探讨了最佳测试条件。用盐酸-氟化氢铵-硝酸-高氯酸溶解试样,在10%的盐酸介质中,用火焰原子吸收光谱仪于波长328.1 nm处,以空气-乙炔火焰测定铅精粉中的银量,克服了用铅析或灰吹法测定的步骤冗长等缺点。用铅精粉国家一级标准物质GBW 07167分析验证,测定结果与标准值吻合。方法精密度(RSD,n=12)为2.2%~4.3%,方法检出限为1.2μg/g。方法分析快速,简单。
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| 关 键 词： | 高氯酸-盐酸 火焰原子吸收光谱法 铅精粉 银 |
| 收稿时间： | 2009/11/24 0:00:00 |
| 修稿时间： | 3/5/2010 12:00:00 AM |
Simultaneous Determination of Niobium and Tantalum in Ore Samples by K-ratio H-point Standard Addition Spectrophotometry |
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| TAO Hui-lin,ZHU Shi-yi and ZHENG Sheng-zheng.Simultaneous Determination of Niobium and Tantalum in Ore Samples by K-ratio H-point Standard Addition Spectrophotometry[J].Rock and Mineral Analysis,2010,29(6):703-706. |
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| Authors: | TAO Hui-lin ZHU Shi-yi and ZHENG Sheng-zheng |
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| Institution: | College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China;College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China;College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | In chloride acid medium,salicyl fluorone-cetyl pyridinium could react with niobium(Nb) and tantalum(Ta) respectively to form ternary micelle complexes,but the complexes exhibit serious spectrum overlap and are not used for spectrophotometric determination of Nb and Ta.In this paper,a new method for simultaneous determination of Nb and Ta in ore samples by K-ratio and H-point standard addition spectrophotometry(HPSA) without chemical separation was reported.The optimum wavelength pairs were selected by home-made procedure in Origin 7.5 software.The spectrum interference on determination of Nb and Ta could be eliminated using K-ratio HPSA method.Under the optimum conditions,the linear ranges of determination for Nb and Ta were(0.4~5.8)×10-5 g/L and(0.4~11.2)×10-5 g/L with a detected limit of 0.28 μg/L and 0.22 μg/L respectively.The determination precision were 0.54%~0.88% RSD for Nb and 0.88%~1.52% RSD for Ta.The method has been applied to the simultaneous determination of Nb and Ta in ore samples with satisfactory results. |
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| Keywords: | K-ratio H-point standard addition method spectrophotometry niobium tantalum simultaneous determination |
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