Abstract：Trace chromium （Ⅵ） had catalytic effect on hydrogen peroxide-neutral red reaction system in diluted sulfuric acid medium, enhancing the fluorescence intensity. Moreover, the mass concontration of Cr （Ⅵ）in the range of 8.0-48.0 μg/L showed linearity to the change of fluorescence intensity (△F). Based on this, a new determination method of Cr（Ⅵ）by catalytic fluorescence spectrophotometry was established. The excitation wavelength (λex) and emission wavelength (λem) of this system was 547 nm and 648 nm, respectively. The apparent rate constant (k) and reaction activation energy (Ea) of catalytic reaction was 8.05×10-2s-1 and 31.47 kJ·mol-1, respectively. The detection limit of Cr（Ⅵ） was 4 μg/L. The method was applied to the determination of Cr（Ⅵ） in synthetic water sample and metallurgical industry wastewater. The found results were consistent with those obtained by diphenylcarbazide spectrophotometry. The relative standard deviation (RSD, n=5) was smaller than 4 %.
刘卫洁，王胜利，高玉红，冯存霞. 铬（Ⅵ）-过氧化氢-中性红体系催化荧光光度法测定工业废水中铬（Ⅵ）[J]. 冶金分析, 2012, 32(5): 49-52.
LIU Wei-jie，WANG Sheng-li，GAO Yu-hong，Feng Cun-xia. Determination of chromium（Ⅵ）in industry wastewater by catalytic fluorescence spectrophotometry in Cr（Ⅵ）hydrogen peroxide neutral red system. , 2012, 32(5): 49-52.
