| Minimizing chemical interference errors for the determination of lithium in brines by flame atomic absorption spectroscopy analysis |
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| 作者姓名： | WEN Xianming MA Peihua ZHU Geqin WU Zhiming |
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| 作者单位： | [1]Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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| 摘 要： | Chemical interferences （ionization and oxide/hydroxide formation） on the atomic absorbance signal of lithium in FAAS analysis of brine samples are elaborated in this article. It is suggested that inadequate or overaddition of deionization buffers can lead to loss of sensitivities under particular operating conditions. In the analysis of brine samples, signal enhancing and oxide/hydroxide formation inducing signal reduction resulting from overaddition of deionization buffers can be seen with varying amounts of chemical buffers. Based on experimental results, the authors have arrived at the optimized operating conditions for the detection of lithium, under which both ionization and stable compound formation can be suppressed. This is a simplified and quick method with adequate accuracy and precision for the determination of lithium in routine brine samples from chemical plants or R＆D laboratories, which contain comparable amounts of lithium with some other components.
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| 关 键 词： | 分析化学 简化方法 FAAS 锂 盐水 消电离作用 氧化物/羟化物构成 火焰原子吸收光谱分析 |
| 收稿时间： | 2005-07-12 |
Minimizing chemical interference errors for the determination of lithium in brines by flame atomic absorption spectroscopy analysis |
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| WEN Xianming MA Peihua ZHU Geqin WU Zhiming.Minimizing chemical interference errors for the determination of lithium in brines by flame atomic absorption spectroscopy analysis[J].Rare Metals,2006,25(4):309-315. |
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| Authors: | WEN Xianming MA Peihua ZHU Geqin WU Zhiming |
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| Affiliation: | 1. Research Center for Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, School of Resources and Materials, Northeastern University at Qinhuangdao Branch, Qinhuangdao 066004, China;1. Lappeenranta University of Technology, LUT Chemistry Department, Laboratory of Green Chemistry, Sammonkatu 12, FI-50130 Mikkeli, Finland;2. Beni-Suef University, Faculty of Science, Geology Department, Beni-Suef, Egypt;3. Centre National de Recherche en Sciences des Matériaux, Technopole Borj Cedria, B.P.73, 8027 Soliman, Tunisia |
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| Abstract: | Chemical interferences (ionization and oxide/hydroxide formation) on the atomic absorbance signal of lithium in FAAS analysis of brine samples are elaborated in this article. It is suggested that inadequate or overaddition of deionization buffers can lead to loss of sensitivities under particular operating conditions. In the analysis of brine samples, signal en-hancing and oxide/hydroxide formation inducing signal reduction resulting from overaddition of deionization buffers can be seen with varying amounts of chemical buffers. Based on experimental results, the authors have arrived at the optimized operating conditions for the detection of lithium, under which both ionization and stable compound formation can be sup-pressed. This is a simplified and quick method with adequate accuracy and precision for the determination of lithium in rou-tine brine samples from chemical plants or R&D laboratories, which contain comparable amounts of lithium with some other components. |
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| Keywords: | analytical chemistry simplified method FAAS lithium brine deionization oxide/hydroxide formation |
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