| 液膜富集—火焰原子吸收法测定水中痕量铅 |
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| 引用本文： | 苏庆平 张仕鹏. 液膜富集—火焰原子吸收法测定水中痕量铅[J]. 矿物岩石, 1999, 19(1): 97-99 |
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| 作者姓名： | 苏庆平 张仕鹏 |
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| 作者单位： | 成都理工学院应用化学系 |
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| 基金项目： | 地矿部环境地质重点学科项目资助 |
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| 摘 要： | 用乳状液膜体系对水中痕量铅进行分离富集，研究表面活性剂，内相试剂，膜增强剂等对分离富集过程的影响，确定了二环己基－１８－冠－６（ＤＣ－１８－Ｃ－６）－Ｓｐａｎ８０－丙三醇－四氯经碳－Ｎａ４Ｐ４Ｏ７液膜体系的最佳组成及最适宜的实验条件，并用该法与火焰原子吸收法结合测定天然水中的痕量铅，富集倍数为４５左右，回收率大于９９％，相对标准偏并为０．７７％。
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| 关 键 词： | 液膜 富集 火焰原子吸收法 铅 水 |
DETERMINATION OF TRACE LEAD IN WATER BY ENRICHMENT WITH LIQUID EMULSION MEMBRANE AND FLAME ATOMIC ABSORPTION SPECTROMETRY |
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| Su Qingping Zhang Shipeng Li Fang Wang Mohui. DETERMINATION OF TRACE LEAD IN WATER BY ENRICHMENT WITH LIQUID EMULSION MEMBRANE AND FLAME ATOMIC ABSORPTION SPECTROMETRY[J]. Journal of Mineralogy and Petrology, 1999, 19(1): 97-99 |
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| Authors: | Su Qingping Zhang Shipeng Li Fang Wang Mohui |
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| Abstract: | The liquid emulsion membrane has been applied to the enrichment of lead in water for its determination.The effects of surfactant,internal phase reagent,membrane reinforcer,etc.on enrichment have been studied and the optimal constituents of dicyclohexyl-18 crown 6(DC 18 C 6)-Span80-propanetriol-penixin-Na 4P 2O 7 liquid membrane system and optimal conditions of enrichment were obtained.An enrichment of 45 fold and recovery of over 99% were gained respectively for trace lead.The method has been successfully applied to the determination of trace lead in water samples by flame atomic absorption spectrometry.The relative standard deviation is 1.1%. |
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| Keywords: | liquid emulsion membrane enrichment flame atomic absorption spectrometry lead |
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