新催化动力学光度法测定Fe(Ⅲ)  

A New Kinetic Spectrophotometric Method for the Determination of Fe(Ⅲ)

作　　者：秦晓琴[1] 高春光[1] 赵永祥[1] 

机构地区：[1]山西大学化学化工学院,太原030006

出　　处：《分析科学学报》2004年第3期293-295,共3页Journal of Analytical Science

摘　　要：基于在酸性和沸水浴条件下,Fe(Ⅲ)对高碘酸钾氧化鸡冠花红的反应具有非常显著的催化作用,据此建立了测定Fe(Ⅲ)的新的动力学分析方法。该方法简单、快速,此法的线性范围为2.0～90ng/mL,检出限为1.89ng/mL,对于50ng/mL的Fe(Ⅲ)测定11次的相对标准偏差是1.14%,方法应用于水样中Fe(Ⅲ)的测定,结果满意。A novel kinetic spectrophotometric method for the determination of trace amounts of Fe(Ⅲ) has been described. It is based on the catalytic effect of Fe(Ⅲ) on the reaction of potassium periodate oxidizs amaranth in H_(2)SO_(4) media at 100℃. The linear range of determination is 2.0～90 ng/mL for Fe(Ⅲ), and the detection limit is 1.89 ng/mL. The method has been applied to the determination of the content of Fe(Ⅲ) in lake water and lab water sample with satisfactory results.

关 键 词：催化动力学光度法 Fe(Ⅲ) 鸡冠花红 

分 类 号：O657.32[理学—分析化学] O614.811[理学—化学]