动力学荧光法测定痕量砷(Ⅲ)的研究  

Study on Kinetic Fluorescence Determination of Trace Arsenic(Ⅲ)

作　　者：朱仁和[1] 陈兰化[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《分析科学学报》2011年第4期501-503,共3页Journal of Analytical Science

摘　　要：在HCl介质中,利用As(Ⅲ)对过硫酸钾氧化藏红T的褪色反应具有显著的阻抑作用,使藏红T的荧光强度增强,据此建立了动力学荧光法测定As(Ⅲ)的新方法。方法的线性范围为10～1 600μg/L,检出限为3.8μg/L。该法用于环境水样中痕量As(Ⅲ)的测定,相对标准偏差小于4.2%,加标回收率为98.5%～104%。A new method was established for the determination of As（Ⅲ） based on the inhibition effect of As（Ⅲ） on the oxidation of safranine T by potassium persulfate.The linear range of this method was 10～1 600 μg /L and the detection limit was 3.8 μg /L.The proposed method has been applied to the detection of As（Ⅲ） in environmental samples with the relative standard deviations less than 4.2%,and the recoveries were between 98.5% and 104%.

关 键 词：动力学荧光法 As(Ⅲ) 阻抑 藏红T 

分 类 号：O657.39[理学—分析化学]