催化动力学光度法测定痕量铁及反应机理的研究  

Catalytic Spectrophotometric Determination of Trace Iron and Its Kinetic Mechanism

作　　者：王晓菊[1] 辛红[1] 

机构地区：[1]长春师范学院化学系,吉林长春130032

出　　处：《长春师范学院学报（自然科学版）》2003年第2期21-23,共3页Journal of Changchun Teachers College

摘　　要：本文研究了在弱酸介质中,铁催化过氧化氢还原次甲基蓝使其褪色这一指示反应及其动力学条件,并测定了反应的动力学参数,探讨了反应机理,据此建立了高灵敏地测量痕量铁的新方法,该方法线性范围为0～20μg/L,检出限为3.4×10^(-6)g/L。本方法简便,分析费用低,可直接用于环境水样中痕量铁的测定。A kinetic spectrophotometric method for determination of trace iron(Ⅲ) was established. It was based on the Fe (Ⅲ) catalyzed the discoloring reaction of hydrogen peroxide (H_2O_2) reduced methylene blue in the presence of HAc-NaAc solution. The limit of detection is 3.4×10~6g/L.The rang of determination is 0～20ug/L. The optimum reaction conditions and the kinetic parameters of was determined. The kinetic reaction mechanism was also inquired. The method has been applied to the determination of iron in water ...

关 键 词：催化动力学光度法 铁 过氧化氢 次甲基蓝 褪色反应 

分 类 号：O614.811[理学—无机化学] O657.3[理学—化学]