表面活性剂-火焰原子吸收法测定人发中的微量铁

Surfactant-FAAS Determination of Trace Fe in Hair

研究了用表面活性剂十二烷基硫酸钠测定铁的火焰原子吸收法 ,摸索了测定条件 ,在 1 mol/ L盐酸介质中 ,选定合适的仪器工作条件 ,铁含量 0 .0 2～ 0 .2 mg/ L范围内符合比尔定律 ,检出限量铁浓度为 1 .8mg/ L.经实际样品分析 ,变异系数不大于 3.6% ,样品加标回收率为 98%～ 1 0 2 % .

It has been found that the determination of Fe is formed with surfactant sodiumlaurilsurface-FAAS.The suitable instrument working condition is selected in the presence of 1 mol/L hydrochloric acid.Beer's law is obyed in the range of 0.02～0.2mg/L and the coefficient of variation is 3.6% with true sample.The rate of recovery is 98%～102%,the determination limit is 1.8mg/L and the results have been obtained satisfactorilly.