摘要
用Fe(OH)_3作捕集剂,Cu^(2+)、Ni^(2+)与其生成的共沉淀用流动注射法富集并与基体分离,酸洗脱后火焰原子吸收光度法测定。用于工业烧碱中铜、镍的测定,在30h^(-1)和120h^(-1)的进样频率下,富集倍数分别为14.8和4.7,检出限分别为5ng·ml^(-1)和60ng·ml^(-1),能满足烧碱中铜、镍的分析要求。
A flow injection approach for the preconcentration of copper and nickel from caustic soda by coprecipitation with Fe(OH)3 is proposed. With sampling frequencies of 30h-1 and 60h-1 for copper and nickel respectively ,concentration factors of 14.8 and 4. 7 are achieved. The interferences caused by the foreign ions,mainly Mg2+, were examined and discussed. The determination is concluded by flame atomic absorption spectrometry,and when applied to the analysis of industrial caustic soda,the RSD obtained are 6. 2%(n = 6) and 3. 2% (n=5),the average recovery obtained are 98. 5% and 95. 3% ,and the detection limits (3o) are 5. 0ng ?ml-1 and 60ng ?ml-1,for copper and nickel respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1996年第1期16-18,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
原子吸收光度法
铜
镍
烧碱
氢氧化钠
Coprecipitation Flow injection preconcentratton Flame atomic absorption spectrometry Copper Nickel Caustic soda
