| 光谱学与光谱分析 |
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| Research of Hg2+ Sol-Gel Membrane Made of Organically Modified |
| GUO Liang-qia, ZHANG Wei, YAN Jian-feng, LIN Xu-cong, XIE Zeng-hong*, CHEN Guo-nan |
| Institute of Food Safety and Environmental Monitoring, Fuzhou University, Fuzhou 350002, China |
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Abstract A photochemical sensor for the determination of Hg2+ consisting of organically modified silicates (ormosils) was developed. Hg2+-sensitive fluorescent sol-gel films were prepared by co-condensation of tetramethoxysilane (TMOS) and dimethyldimethoxysilane (DMOS), and the fluorescent indicator 5,10,15,20-tetra (p-sulfonatophenyl)porphyrin sodium was embedded in sol-gel in the form of ion pairs with cetyltrimethyl ammonium bromide. The optimization condition of preparation and response performance of sol-gel membrane were investigated. The experimental results showed a linear range of Hg2+ concentrations from 1.0×10-5 to 1.0×10-4 mol·L-1 in a Tris-HCl buffer at pH 8.0 with fast response and good repetition. The indicators in the sol-gel membrane did not leak out and the sensor showed good selectivity over other metal ions.
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Received: 2004-12-26
Accepted: 2005-06-26
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Corresponding Authors:
XIE Zeng-hong
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| Cite this article: |
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GUO Liang-qia,ZHANG Wei,YAN Jian-feng, et al. Research of Hg2+ Sol-Gel Membrane Made of Organically Modified[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(07): 1281-1284.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2006/V26/I07/1281 |
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