用1-亚硝基-2-萘酚修饰的微晶蒽分离富集与测定环境水中钴  

Determination of trace cobalt(II) in environmental water samples via separation and preconcentration using microcrystalline anthracene modified with 1-nitroso-2-naphthol

作　　者：李晶[1] 王旭[1] 李全民[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省环境污染控制重点实验室,新乡453007

出　　处：《分析试验室》2012年第7期55-57,共3页Chinese Journal of Analysis Laboratory

基　　金：河南省自然科学基金(0511020500)资助

摘　　要：建立了微晶蒽分离富集环境水样中痕量Co(II)的方法。在pH3.0条件下,1-亚硝基-2-萘酚与Co(II)形成红棕色螯合物被微晶蒽定量吸附,能使Co(II)与Pb(II)、Ni(II)、Mn(II)、Cu(II)、Cd(II)、Zn(II)、Fe(III)、Cr(III)、Al(III)等常见离子分离。本法富集倍数达100倍,检出限为0.14μg/L,回收率97.5%～105%,已应用于不同水样中Co(II)的测定。An alternative method for the preconcentration and determination of trace cobalt（II） using microcrystalline anthracene modified with 1-nitroso-2-naphthol as an adsorbent.The possible reaction mechanism for the enrichment of Co（II） was discussed in detail.Under the optimum conditions,Co（II） can be completely separated from Pb（II）,Ni（II）,Mn（II）,Cd（II）,Zn（II）,Fe（III）,Cr（III）,Al（III） in the solution.The recoveries of this method are in the range of 96.8%~105.0% with preconcentration factor of 100.The limit of detection after preconcentration is 0.14μg/L.The recommended method has been successfully applied to the determination of trace cobalt in effluents and synthetic water samples.Analytical results obtained were very satisfactory.

关 键 词：微晶蒽 1-亚硝基-2-萘酚 分离富集 钴(II) 

分 类 号：O657.3[理学—分析化学]