ⅠB、ⅡB族金属元素硫化物纳米微粒的光谱研究  

Scattering spectrum of metal sulfides nanoparticle of ⅠB、ⅡB subgroup elements and their application

作　　者：胡文武[1] 韩志辉[2] 

机构地区：[1]长沙市疾病预防控制中心,湖南长沙410001 [2]湖南省劳动卫生职业病防治所,湖南长沙410007

出　　处：《中国热带医学》2008年第9期1500-1502,共3页China Tropical Medicine

摘　　要：目的建立相应痕量金属离子的分析测定方法。方法在TritonX-100存在条件下,用铅作为比较元素,研究ⅠB、ⅡB族金属元素(M)硫化物纳米微粒液相稳定体系吸收光谱、散射光谱的特性和变化规律。结果在一定浓度范围内,不同的MS体系的光散射种类不同:CuS、ZnS和CdS产生弱的Rayleigh光散射;Ag2S和PbS产生强烈的共振Rayleigh光散射;与其它性质一样,液相难溶性MS纳米粒子的光散射特性反映了MS的理化特性,散射光强度与M自身电子结构、电负性、Mn+半径以及MS的Ksp具有密切的关联,与Mn+浓度之间呈现良好的线性关系。结论方法具有良好的选择性,操作简便,用于定量分析结果满意。Objective To set up a method for determination of corresponding trace metal ions. Methods In the presence of TritonX - 100, the ⅠB , ⅡB subgroup metals was allowed to react with S2- to form liquid stabile sytems of metal sultides naoparticle, and the characteristics and regularity of scattering and absorption spectrum of the liquid systems were studied by comparing with PbS. Results The results showed that the light scattering of MS systems were various in suitable concentration： The scattering of CuS, ZnS and CdS systems was rayleigh light scattering （RLS）, but the scattering of Ag2 S and PbS system was resonance rayleigh scattering（RRS）. The light scattering characteristics of liquid insoluble MS naoparticle reflected its physical and chemical properties. The enhanced intensity of light scattering of metal sulfides was correlative linearly to the electron formation of elements, electronegativities, radius of metal ions and Ksp of metal sulfides and proportional to the concentration of metal ions. Conclusion This method is simple and convenient and it can be used quanfitatibe determination of trace metal ions with satisfactory results.

关 键 词：ⅠB ⅡB族金属 硫化物纳米微粒 共振Rayleigh散射光谱 

分 类 号：R123.1[医药卫生—环境卫生学]