利用新的催化动力学光度法测定痕量Fe(Ⅲ)  

Study of new method for spectrophotometric determination of trace iron (Ⅲ) by catalytic kinetics

作　　者：杨波[1] 陈尚东[1] 夏心泉[1] 高奎[1] 

机构地区：[1]沈阳化工学院,辽宁沈阳110021

出　　处：《沈阳工业大学学报》2003年第2期178-180,共3页Journal of Shenyang University of Technology

摘　　要：研究了稀硫酸介质中,痕量铁(Ⅲ)催化过氧化氢氧化酚红而使其褪色的新指示反应及动力学参数,测定了反应速度常数和表观活化能,建立了一种测定痕量铁(Ⅲ)的新方法,该方法检出限为1.74×10-10g/mL,线性范围是0～0 4μgFe3+/25mL.用于水样、人发中痕量铁(Ⅲ)的测定.The oxidation of Phenol red by hydrogen peroxide in sulfuric acid medium using Fe(Ⅲ) as catalyst and kinetic parameter are investigated. The reaction speed constant and the apparent activation energy have been determined.A new method for the determination of trace iron(Ⅲ) has been set up.The limit of detection is 174×10-10 g/mL of iron(Ⅲ) and the linear range of iron(Ⅲ) is 0～04?μg Fe3+/25?mL.The method has been applied to the determination of trace iron(Ⅲ) in water samples?hair with satisfactory results.

关 键 词：催化动力学光度法 铁 测定 Fe(Ⅲ) 痕量分析 反应速度常数 表观活化能 

分 类 号：O614.811[理学—无机化学] O657.3[理学—化学]