化学研究与应用
化學研究與應用
화학연구여응용
CHEMICAL RESEARCH AND APPLICATION
2010年
2期
191-193
,共3页
铁%催化光度法%茜素红%罗丹明B
鐵%催化光度法%茜素紅%囉丹明B
철%최화광도법%천소홍%라단명B
iron%catalytic spectrophotometry%alizarin red%rhodamine B
A new catalytic spectrophotometric method for the determination of trace iron was established in this paper.The method was based on the fadiag 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 wsa 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.
