光谱学与光谱分析 |
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Spectrophotometric Study on the Color Reaction of Multicomponent Complex of Tungsten-3,5-Dibromosalicyl Fluorone-CTMAB-Tween80 |
WANG Jun, WEI Xian-jun, LI Quan-min*,YANG Lin |
College of Chemistry and Environmental Science, Key Laboratory of Environmental Pollution Control Technology of Henan Province, Henan Normal University, Xinxiang 453002, China |
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Abstract In the presence of mixed surfactant cetyl trimethyl ammonium bromide(CTMAB) and Tween80, the photometric analysis properties of color reaction of 3,5-dibronosalicyl fluorone (DBSAF) with tungsten(Ⅵ) were studied. The experimental result showed that tungsten(Ⅵ) reacted with DBSAF to form a micelle complex with a maximum absorption at 527 nm in a 0.60 mol·L-1 hydrochloric acid medium. The mixed surfactant remarkably improved the sensitivity of the method and the dissolubility of the complex. The apparent molar absorptivity of the complex is 2.64×105 L·mol-1·cm-1 at 527 nm. Tungsten (Ⅵ) reacted with DBSAF to form a complex with a stoichiometric ratio of 1∶2, which was determined by mole ratio method and continual method of transformation, respectively. Beer’s law was obeyed in the range of 0-400 μg tungsten(Ⅵ) per L. The proposed method has been applied to the determination of trace amount of tungsten in alloy steel samples.
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Received: 2004-02-28
Accepted: 2004-06-06
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Corresponding Authors:
LI Quan-min
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Cite this article: |
WANG Jun,WEI Xian-jun,LI Quan-min, et al. Spectrophotometric Study on the Color Reaction of Multicomponent Complex of Tungsten-3,5-Dibromosalicyl Fluorone-CTMAB-Tween80 [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(08): 995-998.
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URL: |
http://www.gpxygpfx.com/EN/Y2004/V24/I08/995 |
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