金属(Ⅱ)-双硫腙螯合物微粒的共振散射光谱特性  

Resonance Scattering Spectral Properties of Metal(Ⅱ)-Dithizone Complex Particles

作　　者：周苏梅[1] 陈媛媛[1] 蒋治良[1] 孙双娇[1] 康彩艳[1] 

机构地区：[1]广西师范大学资源与环境学系,桂林541004

出　　处：《应用化学》2005年第11期1274-1276,共3页Chinese Journal of Applied Chemistry

基　　金：广西高校自然科学基金资助项目

摘　　要：In basic NH3-NH4Cl buffer solutions,the molecules of complex of some metal（Ⅱ） ions with dithizone can associate one another to produce stable micro-particles,which exhibit resonance photo scattering effect and different color.There is a strongest resonance scattering peak at 605 nm for Zn（Ⅱ）,at 540 nm for Pb（Ⅱ）,at 600 nm for Co（Ⅱ）,at 560 nm for Ni（Ⅱ）,at 560 nm for Cd（Ⅱ）, at 570 nm for Cu（Ⅱ） and at 560 nm for Hg（Ⅱ） in their corresponding particle systems.There is a linear relationship between the scattering intensity and metal ion concentration.Among them,the system of Zn（Ⅱ）-dithizone is most sensitive and is therefore chosen for the determination of Zn concentration in the range of 2.0×10-81.54×(10-6 g/mL),with a detection limit of 8.0×10-9 g/mL.This method has been applied to the determination of microelement Zn in samples with satisfactory sensitivity,simplicity and reproducibility.In basic NH3-NH4Cl buffer solutions, the molecules of complex of some metal（ Ⅱ ） ions with dithizone can associate one another to produce stable micro-particles, which exhibit resonance photo scattering effect and different color. There is a strongest resonance scattering peak at 605 nm for Zn（ Ⅱ ）, at 540 nm for Pb（Ⅱ）, at 600 nm for Co（ Ⅱ ）, at 560 nm for Ni（Ⅱ）, at 560 nm for Cd（Ⅱ）, at 570 nm for Cu（Ⅱ） and at 560 nm for Hg（Ⅱ） in their corresponding particle systems. There is a linear relationship between the scattering intensity and metal ion concentration. Among them, the system of Zn （Ⅱ）-dithizone is most sensitive and is therefore chosen for the determinafion of Zn concentration in the range of 2. 0 × 10^-8 - 1.54 × 10^-6 g/mL, with a detection limit of 8.0 × 10^-9 g/mL. This method has been applied to the determination of microelement Zn in samples with satisfactory sensitivity, simplicity and reproducibility.

关 键 词：双硫腙 锌 螯合物微粒 共振散射 

分 类 号：O614.1[理学—无机化学]