催化动力学光度法测定痕量铁  

Determination of Trace Iron by Catalytic Kinetic Spectrophotometry

作　　者：于宝杰[1] 王颖[1] 刘颖[1] 

机构地区：[1]吉林工学院轻纺工程系,吉林长春130012

出　　处：《吉林工学院学报（自然科学版）》2002年第2期52-53,共2页Journal of Jilin Institute of Technology

摘　　要：基于在pH =7 0的磷酸盐缓冲体系中 ,铁离子对过氧化氢氧化次甲基蓝褪色反应的催化作用 ,提出了动力学光度法测定痕量铁的新方法 ,研究了该方法的适宜反应条件 ,方法的检出限为 7 91× 10 - 7,线性范围为 0～ 1 5 μg (2 5mL)。Based on the catalytic effect of ferrous ion in the oxydizing decolouration of methylene blue by hydrogen peroxide in a medium of pH=7 0, a new catalytic kinetic method is proposed for the determination of trace iron. The optimum conditions of the method has been obtained. The detection limit and the linear range are 7 91×10 -7 and 0～1 5 μg/(25 mL) respectively. The method has been applied to the determination of trace iron in water and flour with satisfactory results.

关 键 词：催化动力学光度法 测定 次甲基蓝 铁 痕量分析 磷酸盐缓冲体系 

分 类 号：O614.811[理学—无机化学] O657.3[理学—化学]