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
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.
王 军，魏献军，李全民*, 杨 林 . 钨-3，5二溴水杨基荧光酮-CTMAB-Tween80多元配合物的分光光度法研究 [J]. 光谱学与光谱分析, 2004, 24(08): 995-998.
WANG Jun, WEI Xian-jun, LI Quan-min*，YANG Lin . Spectrophotometric Study on the Color Reaction of Multicomponent Complex of Tungsten-3,5-Dibromosalicyl Fluorone-CTMAB-Tween80 . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(08): 995-998.
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