Ni_xCo_yMn_(1-x-y)(OH)_2中铁含量的测定

The determination of Fe(Ⅲ) content in Ni_xCo_yMn_(1-x-y)(OH)_2

用萃取法将NixCoyMn1-x-y(OH)2酸性溶液中的Fe(Ⅲ)分离,并以乙酸乙酯为萃取剂,通过原子吸收光谱法测定Fe(Ⅲ)含量。研究了萃取酸度、萃取相比Vo∶VS以及反萃取相比VS∶VA对分析Fe(Ⅲ)含量的影响。萃取酸度为6 mol/L、Vo∶VS=2∶1及VS∶VA=1∶2为最佳萃取条件。建立的分析方法,相对标准偏差(RSD)为1.08%,加标回收率为97.70%～99.56%。

Using extraction method to separate Fe（ Ⅲ） from NixCoyMnl-x-y（OH）2acid solution,then using ethyl acetate as ex-traction agent, via atomic absorption spectrometry to determinate Fe （Ⅲ） content. The influences of extraction acidity, extraction phase ratio Vo： Vs and stripping phase Vs： VA to the analysis of Fe（ Ⅲ） content were studied. The optimal extraction conditions were extraction acidity of 6 mol/L, Vo： Vs = 2：1 and Vs： VA = 1：2. The relative standard deviation（RSD） of established analysis method was 1.08% ,the recovery was 97.70% - 99. 56%.