Catalytic spectrophotometric determination of trace vanadium in fly ash and coal gangue by Triton X-100 enhancing effect
来源期刊：Rare Metals2004年第1期
论文作者：XIA Changbin and HUANG NiandongInstitute of Environmental Engineering & Chemical Hi-tech, Hunan University of Science and Technology, Xiangtan , China
文章页码：10 - 14
摘 要：<正> Trace V（V） catalyzes mightily the decolorization reaction of arsenazo Ⅲ（AsA Ⅲ） by oxidizing with H2O2 in a pH 4.0 HAc-NaAc buffer solution, and the addition of Triton X-100 can further increase the sensitivity of the reaction and its catalytic extent is linear with the content of V（V）. A catalytic spectrophotometric procedure for determining trace V（V）was developed. The results show that the maximun absorption of the color solution is at 560 nm and the detection limit of the method for V（V） is 0.014 mg.L-1. Beer’s law is obeyed for V（V） in the range of 0.00-0.20 mg.L-1. The recoveries are 99.0%-104.6%, and the relative standard deviations （RSD） are 2.7%-3.7%. Combined with ion-exchange resin, the method has been applied to the determination of trace vanadium in fly ash and coal gangue with satisfactory results.
摘要：<正> Trace V（V） catalyzes mightily the decolorization reaction of arsenazo Ⅲ（AsA Ⅲ） by oxidizing with H2O2 in a pH 4.0 HAc-NaAc buffer solution, and the addition of Triton X-100 can further increase the sensitivity of the reaction and its catalytic extent is linear with the content of V（V）. A catalytic spectrophotometric procedure for determining trace V（V）was developed. The results show that the maximun absorption of the color solution is at 560 nm and the detection limit of the method for V（V） is 0.014 mg.L-1. Beer’s law is obeyed for V（V） in the range of 0.00-0.20 mg.L-1. The recoveries are 99.0%-104.6%, and the relative standard deviations （RSD） are 2.7%-3.7%. Combined with ion-exchange resin, the method has been applied to the determination of trace vanadium in fly ash and coal gangue with satisfactory results.
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