| 光谱学与光谱分析 |
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| A New Method of Avoiding Entrainment Swelling in Liquid Surfactant Membrane for the Determination of Trace Hg(Ⅱ) |
| YU Hui-fen，XU Lin-lin，DING Peng |
| Department of Chemistry，Changchun Normal College，Changchun 130032, China |
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Abstract Entrainment swelling consists of occlusion swelling and reliquefaction swelling. Entrainment swelling is significant to industrialized liquid surfactant membrane in the process of operation. The present study based on the life-span of W/O emulsion and O/W emulsion discussed the process of forming entrainment swelling. The result shows that no matter what surface-active agent was used, the life-span of W/O emulsion is 20-88 times longer than that of O/W emulsion. After oil drop was dispersed in water，no swelling was discovered, thus, the ratio of swelling is less than that by other method. The new method of determination of trace mercury by avoiding entrainment swelling in liquid surfactant membrane and FAAS is described. The precision(RSD) and recovery are 1.9%-2.3％ and 99.8％-101.1% respectively. Hg2+ at ng·g-1 level can be enriched and determined. This method can be used in the determination of trace mercury in waste water.
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Received: 2003-06-26
Accepted: 2003-11-01
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Corresponding Authors:
YU Hui-fen
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| Cite this article: |
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YU Hui-fen,XU Lin-lin,DING Peng. A New Method of Avoiding Entrainment Swelling in Liquid Surfactant Membrane for the Determination of Trace Hg(Ⅱ) [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(02): 311-313.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2005/V25/I02/311 |
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[2] YU Hui-fen，SUN Gui-qing(于惠芬，孙桂清). Chinese J. of Analysis Laboratory(分析试验室)，2000，19(3)：28.
[3] YU Hui-fen, LI Jing-chang, WANG Yun-ping et al(于惠芬，李金昶，王云平等). Chinese Journal of Analytical Chemistry(分析化学), 1995, 23: 805.
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