Catalytic kinetic spectrophotometric determination of cerium
来源期刊：Journal of Rare Earths2010年第3期
论文作者：李景梅 魏文涛
文章页码：387 - 390
摘 要：A new procedure for the determination of cerium was established using the catalytic effect of Ce（IV） on the oxidation of tribromoarsenazo（TB-ASA） by potassium bromate.In 0.080 mol/L sulfuric acid medium,the maximum absorption peak of Ce（IV）-（TB-ASA）-KBrO3 system is at 510 nm.The amount of Ce（IV） and the difference of absorbance（△A） showed a good linear relationship over the range of 5.7×10-8-5.1×10-7 mol/L.The regression equation is △A=2.3×10-11 C（C:mol/L）+0.0196,with a regression coefficient of 0.9914 at the wavelength.The detection limit of the method was 5.1×10-8 mol/L ng/mL.This method was used in the determination of cerium in human blood and chicken liver samples.For the eleventh replicate determinations,its relative standard deviation was 3.04%-3.28%.The recovery of standard addition of the method was 100.7%-104.2 %.
李景梅，魏文涛
Research Center for Nanotechnology,Changchun University of Science and Technology
摘 要：A new procedure for the determination of cerium was established using the catalytic effect of Ce（IV） on the oxidation of tribromoarsenazo（TB-ASA） by potassium bromate.In 0.080 mol/L sulfuric acid medium,the maximum absorption peak of Ce（IV）-（TB-ASA）-KBrO3 system is at 510 nm.The amount of Ce（IV） and the difference of absorbance（△A） showed a good linear relationship over the range of 5.7×10-8-5.1×10-7 mol/L.The regression equation is △A=2.3×10-11 C（C:mol/L）+0.0196,with a regression coefficient of 0.9914 at the wavelength.The detection limit of the method was 5.1×10-8 mol/L ng/mL.This method was used in the determination of cerium in human blood and chicken liver samples.For the eleventh replicate determinations,its relative standard deviation was 3.04%-3.28%.The recovery of standard addition of the method was 100.7%-104.2 %.
关键词：
