| Simultaneous determination of some trace metal impurities in high-purity sodium tungstate using coprecipitation and inductively coupled plasma atomic emission spectrometry |
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| 引用本文： | MAXiaoguo KUANGTongchun LIUQianjun. Simultaneous determination of some trace metal impurities in high-purity sodium tungstate using coprecipitation and inductively coupled plasma atomic emission spectrometry[J]. 稀有金属(英文版), 2004, 23(3): 193-196 |
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| 作者姓名： | MAXiaoguo KUANGTongchun LIUQianjun |
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| 作者单位： | CenterofAnalysisandTesting,GuangdongUniversityofTechnology,Guangzhou510090,China |
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| 摘 要： | A method based on the combination of coprecipitation with inductively coupled plasma atomic emission spectrometry (ICP-AES) was developed for the determination of impurities in high-purity sodium tungstate. Six elements(Co,Cu,Fe,Mn,Ni,and Pb) were coprecipitated by lanthanum hydroxide so as to be concentrated and separated from the tungsten matrix. Effects of some factors on the recoveries of the analytes and on the residual amount of sodium tungstate were investigated, and the optimum conditions for the coprecipitation were proposed. Matrix-matching calibration curve method was used for the analysis. It is shown that the elements mentioned above can be quantitatively recovered. The detection limits for Co, Cu, Fe, Mn, Ni, and Pb are 0.07, 0.4, 0.2, 0.1, 0.6, and 1.3 μg.g^-1, respectively. The recoveries vary from 92.5% to 108%, and the relative standard deviations (RSDs) are in the range of 3.1%-5.5%.
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| 关 键 词： | 电感耦合等离子体原子发射光谱 共沉淀 痕量分析 钨酸钠 金属杂质 |
Simultaneous determination of some trace metal impurities in high-purity sodium tungstate using coprecipitation and inductively coupled plasma atomic emission spectrometry |
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| MA Xiaoguo,KUANG Tongchun,LIU Qianjun. Simultaneous determination of some trace metal impurities in high-purity sodium tungstate using coprecipitation and inductively coupled plasma atomic emission spectrometry[J]. Rare Metals, 2004, 23(3): 193-196 |
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| Authors: | MA Xiaoguo KUANG Tongchun LIU Qianjun |
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| Affiliation: | Center of Analysis and Testing, Guangdong University of Technology, Guangzhou 510090, China |
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| Abstract: | A method based on the combination of coprecipitation with inductively coupled plasma atomic emission spec trometry (ICP-AES) was developed for the determination of impurities in high-purity sodium tungstate. Six elements (Co,Cu, Fe, Mn, Ni, and Pb) were coprecipitated by lanthanum hydroxide so as to be concentrated and separated from the tungsten matrix. Effects of some factors on the recoveries of the analytes and on the residual amount of sodium tungstate were investigated, and the optimum conditions for the coprecipitation were proposed. Matrix-matching calibration curve method was used for the analysis. It is shown that the elements mentioned above can be quantitatively recovered. The detection limits for Co, Cu, Fe, Mn, Ni, and Pb are 0.07, 0.4, 0.2, 0.1, 0.6, and 1.3 μg.g-1, respectively. The recoveries vary from 92.5% to 108%, and the relative standard deviations (RSDs) are in the range of 3.1%-5.5%. |
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| Keywords: | analytical chemistry trace metal determination inductively coupled plasma atomic emission spectrometry (ICP-AES) coprecipitation sodium tungstate |
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