火焰原子吸收光谱法测定雾化铜粉中锌、铁、铬、锰、镉  

Determination of Zn,Fe,Cr,Mn,and Cd in copper powder by flame atomic absorption spectrometry

作　　者：钱庆长 

机构地区：[1]安徽铜都铜业金昌冶炼厂,安徽铜陵244101

出　　处：《冶金分析》2005年第2期69-71,共3页Metallurgical Analysis

摘　　要：采用硝酸-硫酸混合液溶样,电解法分离基体铜,加热浓缩后,加入相应的硫酸使标样与试样基体匹配,用FAAS法在同一体系中测定锌、铁、铬、锰、镉。结果表明:残液中铜量及其它共存元素都不干扰测定。锌、铁、铬、锰、镉的相对标准偏差均在1 2%～4 8%之间,回收率在92%～108%之间。方法简单,可用于日常分析。A method for determining Zn, Fe, Cr, Mn, and Cd in copper powder is presented.The sample is dissolved with a mixed solution(HNO_3∶H_2SO_4∶H_2O=7∶10∶25),and copper as the main interfering ion is separated by electrolytic method. The sample is concentrated by heating and evaporating. Matrix matching is used in the preparation of working curve. Thus various interferences is avoided.The Zn, Fe, Cr, Mn, and Cd contents is then determined by FAAS in the same solution.The analytical results obtained proved that interferences of copper and the other co-existing ions in the electrolyte is eliminated.The recoveries obtained for Zn, Fe, Cr, Mn and Cd are in the range of 92%-108% with RSDs of 1.2-4.8%(n=6).The proposed method has been applied to the daily analysis with satisfactory results.

关 键 词：火焰原子吸收光谱法 测定 锌 铜粉 雾化 铁 铬 锰 镉 相对标准偏差 FAAS法 加热浓缩 基体匹配 共存元素 混合液 电解法 回收率 硫酸 溶样 试样 

分 类 号：TG115.33[金属学及工艺—物理冶金]