摘要
A new catalytic spectrophotometric method for the determination of trace iron was established in this paper.The method was based on the fading indication reaction between alizarin red and rhodamine B using hydrogen peroxide as oxidant in sulphuric acid medium.It used iron as catalyst.The maximum absorption peak was at 430nm and 560nm,the linear range of the determination was 0.02～0.2 μg /mL and 0.2～0.32 μg/mL,the detection limit for iron was 5.04×10-11 g/mL.The method has high sensitivity,good selectivity and stability.The operation of the system is simple and its reagents is easy to get.The method has been applied to determination of trace iron(Ⅲ)in tea sample with satisfactory results.
A new catalytic spectrophotometric method for the determination of trace iron was established in this paper. The method was based on the fading indication reaction between alizarin red and rhodamine B using hydrogen peroxide as oxidant in sulphuric acid medium. It used iron as catalyst. The maximum absorption peak was at 430nm and 560nm, the linear range of the determination was 0.02 -0.2 μg/mL and 0.2 - 0.32 μg/mL, the detection limit for iron was 5.04 - 10^-11g/mL. The method has high sensitivity, good selectivity aod stability. The operation of the system is simple and its reagents is easy to get. The method has been applied to determination of trace iron（ Ⅲ ）in tea sample with satisfactory results.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2010年第2期191-193,共3页
Chemical Research and Application
基金
安徽省教育厅自然科学基金项目(2006KJ163C)
关键词
铁
催化光度法
茜素红
罗丹明B
iron
catalytic spectrophotometry
alizarin red
rhodamine B
