摘要
研究了α,α′—连吡啶与铁的显色反应,在pH为4 5的盐酸—六次甲基四氨缓冲介质中,α,α′—连吡啶与铁反应生成3∶1稳定络合物,该络合物可被C18固相萃取小柱萃取,小柱上富集的络合物用乙醇洗脱后用光度法测定,体系λmax=520nm,ε=8 60×103L·mol-1·cm-1。铁含量在0—5mg/L内符合比耳定律,方法用于饮用水中铁含量的测定,结果令人满意。
This paper is connected with the color reaction of α,α′-bipyridine and iron. At the condition of pH=4.5 buffer solution, α,α′-bipyridine can react with iron and form a stable 3∶1 complex.After extracted by C18 solid-phase extraction colum and then eluted by alcohol, the complex can be detected at λ=520 nm. The molar absorptivity is 8.60×103 L·mol-1·cm-1,and the beer's law is obeyed in the iron rang of 0 - 5 mg/L. It is satisfied that apply this method to determine iron in drinking water.
出处
《干旱环境监测》
2003年第3期129-130,142,共3页
Arid Environmental Monitoring
