| 光谱学与光谱分析 |
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| Determination of Critical Micelle Concentration of Alkyl Polyglucoside(APG) Nonionic Surfactant Aqueous System By Multi-Peaks Gaussian Fitting of Visible Absorption Spectra Line Shape |
| ZHANG Jian-hua,KONG Kai-qing,HE Zheng-ling,LIU Zi-li |
| Department of Chemistry,Guangzhou University,Guangzhou 510006,China |
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Abstract A multi-peaks Gaussian fitting on the line shape of visible spectra was used to determine the critical micelle concentration (CMC) of alkyl polyglucoside(APG) nonionic surfactant aqueous system such as octyl beta D mono-glucoside(C8G1) and decyl beta D mono-glucoside(C10G1). Visible electronic absorption spectra of a series of different concentration C8G1 or C10G1 with crystal violet(CV) used as a probe were measured respectively and characterized by the overlap of the principal peak with λmax at 598-609 nm and a shoulder at 538-569 nm assigned to monomer and dimer CV respectively. A multi-peaks Gaussian fitting was used to interpret the spectra and give relative integrating absorbance(A2/A1) of two peaks,red-shift(Δλ) and half-width. A sudden change occurred at CMC in the curves of the relative integrating absorbance(A2/A1),red-shift(Δλ) and half-width (w1,w2) versus the C8G1 or C10G1 surfactant concentrations. Significantly the dependence of the CMC upon the half-width was observed for the first time and successfully used to determine CMC of nonionic surfactant such as APG.
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Received: 2006-05-06
Accepted: 2006-08-02
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Corresponding Authors:
ZHANG Jian-hua
E-mail: zjhbox190@sina.com
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| Cite this article: |
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ZHANG Jian-hua,KONG Kai-qing,HE Zheng-ling, et al. Determination of Critical Micelle Concentration of Alkyl Polyglucoside(APG) Nonionic Surfactant Aqueous System By Multi-Peaks Gaussian Fitting of Visible Absorption Spectra Line Shape [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(07): 1412-1415.
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https://www.gpxygpfx.com/EN/Y2007/V27/I07/1412 |
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