8-羟基喹啉-5-磺酸共振光散射法测定铅  

Resonance light scattering detection of Pb^(2+) using 8-hydroxyquinoline-5-sulphonic acid

作　　者：钱秋梅[1] 汤晓霞[1] 张亚淋[1] 王永生[1] 

机构地区：[1]南华大学公共卫生学院,湖南衡阳421001

出　　处：《应用化工》2013年第1期168-170,共3页Applied Chemical Industry

基　　金：湖南省科技厅科技计划资助项目(2010SK3039)

摘　　要：在pH 5.0 BR缓冲液及阳离子表面活性剂CTMAB存在下,8-羟基喹啉-5-磺酸与Pb2+相互作用形成配合物,导致体系的共振光散射(RLS)强度增强,且在8.01×10-8～1.2×10-5mol/L范围内,体系ΔI强度与Pb2+的浓度有良好的线性关系,其回归方程为:ΔF=–91.23+61.21c(×10-6mol/L),相关系数r=0.997 6,检出限为2.40×10-8mol/L,相对标准偏差(RSD)在2.15%～4.01%。用于环境中水样的测定,回收率在96.3%～99.6%。该方法简单、快速、灵敏度高。In the Britton-Robinson buffer solution of pH 5.0,8-hydroxyquinoline-5-sulphonic acid may re- act with Pb2＋ to form a binary complex of HQS-Pb2 ＋ in the presence of cationic surfactant CTMAB, resul- ting in the enhancement of resonance light scattering （RLS） intensity. 2d is directly proportional to the concentration of Pb2＋ in the range of 8.01×10 -s-1.2×10 -5 mol/L. The equation of linear regression is △F = - 91.23 ＋ 61.21c（ ×10-6 mol/L） with a correlation coefficient （r） of 0. 997 6. The detection limit （LOD） is 2.40×10-8 mol/L,the relative standard deviations were 2.15% - 4.01%. And the re- covery was 96.3% -99.6%. The proposed method was simple,rapid and sensitive

关 键 词：铅 8-羟基喹啉-5-磺酸(HQS) 十六烷基三甲基溴化铵(CTMAB) 共振光散射 

分 类 号：TQ203.9[化学工程—有机化工] O657.32[理学—分析化学]