火焰原子吸收光谱法测定红土镍矿中铜含量  

Determination of copper in laterite nickel ore by flame atomic absorption spectrometry

作　　者：李昌丽[1] 蒋晓光[1] 汤淑芳[2] 刘春峰[2] 李华昌[2] 张彦甫[1] 褚宁[1] 

机构地区：[1]鲅鱼圈出入境检验检疫局,辽宁营口115007 [2]北京矿冶研究总院,北京100044

出　　处：《冶金分析》2012年第10期74-77,共4页Metallurgical Analysis

基　　金：国家质检总局科研项目(2009IK072);工业和信息化部2010年有色金属行业标准制订项目(2010-0423T-YS)

摘　　要：红土镍矿样品用盐酸、硝酸、氢氟酸和高氯酸分解,在稀硝酸介质中,采用氘灯扣背景,于原子吸收光谱仪波长324.8nm处,使用空气-乙炔火焰测定铜的含量。在最佳实验条件下,铜的质量浓度在0.50～2.50mg/L范围内与吸光度成线性关系,方法检出限为0.057mg/L,加标回收率为91%～103%。铜质量分数在0.01%～0.50%范围内的重复性及再现性方程分别为r=0.114 8 m+0.003 2和R=0.130 0 m+0.007 4。此方法适合于测定铜含量在0.01%～0.50%的红土镍矿。The laterite nickel ore sample was decomposed with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid. Then, in diluted nitric acid medium, the content of copper was determined on flame atomic absorption spectrometry at 324. 8 nm. The background was deducted with deuterium lamp. Under optimized experimental conditions, the absorbance is linear with copper concentration in the range of 0.50-2.50 mg/L. The limit of determination was 0. 057 mg/L. The recoveries obtained by standard addition method range from 91 % to 103%. Copper content range from 0.01 %to 0.50%, the equation of repeatability and reproducibility are r= 0. 114 8 m＋ 0.003 2 and R 0. 130 0 m＋0. 007 4. This method was applicable for the determination of laterite nickel ore with copper content of 0. 01%-0. 50%.

关 键 词：火焰原子吸收光谱法 红土镍矿 铜 

分 类 号：O657.31[理学—分析化学]