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A Study of Enhancing Agent in Kinetic Analytical Method(Ⅰ)──A New Mn(Ⅱ)-Potassium Periodate-Nitrilo Triacetic acid-1-(2-pyridylazo)-2-naphthol-Triton X-100 Catalytic Spectrophotometric System

ZHENG Zhao-Sheng;JING Wei-Guo(Department of Chemistry, Fuzhou University, Fuzhou,350002)  
The indicator reactions for using in kinetic spectrophotometry are necessarily those reactions of homogeneous system.If the reactants or the products are insoluble,these reactions can not be monitored by spectrophotometry.The authors change non-homogeneous systems into analog-homogeneous systems extending the range of selecting indicator reactions of kinetic spectrophotometry by adding surfactant to insoluble reactions with the solubilizing effect of surfactant.A new catalytic spectrophotometric system for the determination of trace of Mn(Ⅱ)has been developed.This method is based on the catalytic oxidation of 1-2-pyridylazo)-2-naphthol by potassium periodate in the presence of Triton X-100 as a solubilized agent.The detection limit is 3.6×10 ̄(-3)μg/mL,the relative standard deviation is 2.4%,the linear range of determination is 0.1~1.3 μg/25 mL for Mn(Ⅱ). This method has been successfully used to determine Mn in cereal samples.
【Fund】: 福建省自然科学基金
【CateGory Index】: O643
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1 ZHANG Zhen-xin,SUN Deng-ming~*,MA Wei(Department of Chemistry,Huaibei Coal Industry Teacher's College,Huaibei 235000,China);Kinetic spectrophotometric determination of trace manganese by synergistic catalytic effect[J];冶金分析;2005-05
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4 SUN Deng-ming, FANG Hua-caiDepartment of Chemistry, Huaibei Coal Industry Teachers College, Huaibei 235000, China;Determination of Trace Manganese by Non-Organic Solvents Extraction Catalytic Spectrophotometry in Mn(Ⅱ)-H_2O_2-EBT-PEG-2000 System[J];光谱学与光谱分析;2005-08
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10 GENG Wei-dong1,ZHANG Dan-yang2,YANG Ya-ling2(1.Kunming Provinical Center of Productivity Promotion,Kunming 650021,China; 2.Kunming University of Science and Engineering,Kunming 650224,China);Surfactant-Sensitized Catalytic Spectrophotometric Determination of Trace Amount of Manganese[J];理化检验(化学分册);2011-11
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