| 光谱学与光谱分析 |
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| Study on the Interaction between Alginic Sodium Diester and Azur A and the Application |
| LIU Yong-ming, LI Gui-zhi, PAN Fei |
| Chemical College of Yantai University, Yantai 264005, China |
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Abstract The interaction of alginic sodium diester (ASD) and azur A (AA) was studied by absorption spectra. The influence of pH and the molar ratio of AA/ASD on the spectra was investigated. The maximum binding number (N=168) and the binding equilibrium constant (K=3.25×106) of the alginic sodium diester and azur A were obtained by the theoretical model. The new method for the determination of ASD was developed by the formation of ASD-AA ion-association complex that caused the fading of the AA. The detection limit is 0.009 μg·mL-1. The method has the advantages of simplicity, stable system, good accuracy and selectivity, and was applied to the determination of alginic sodium diester in tablets with satisfactory results.
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Received: 2005-12-10
Accepted: 2006-04-20
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Corresponding Authors:
LIU Yong-ming
E-mail: yongming_liu@163.com
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| Cite this article: |
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LIU Yong-ming,LI Gui-zhi,PAN Fei. Study on the Interaction between Alginic Sodium Diester and Azur A and the Application [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(02): 317-320.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I02/317 |
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