摘要
在0．57～1．43mol／L硝酸介质中，用甲基异丁基酮（MIBK）萃取钼酸铵与磷生成的磷钼杂多酸，使磷与基体铁分离后，选择波长213．618nm的谱线作为分析线，采用电感耦合等离子体原子发射光谱法（ICP-AES）测定了高纯铁中磷的含量。校准曲线的线性回归方程为I=15．04ρ＋0．0121，相关系数为0．9996，方法的检础限为0．020mg／L。通过萃取分离和选择合适的谱线作为磷的分析线，基体和共存元素对测定没有干扰。方法用于多个高纯铁标准物质中磷的测定，测定值与认定值一致，测定结果的相对标准偏差（n=10）在0．54％～2．9％之间。方法适用于高纯铁中0．00010％～0．010％磷的测定。
After ammonium phosphate phosphomolybdic heteropoly acid wi us could be separated with iron sub was extracted with methyl isobutyl keton phosphorus in 0.57-1.43 mol/L nitric acid strate. Thus, a method for determination of e （MIBK） to form medium, phosphor- phosphorus in high With extraction separation and the suitable spectral lines as the analytical line for phosp was no interference from the matrix and the coexisting elements with the determination. was applied to the determination of phosphorus in multiple certified reference materials o iron, the results were consistent with the certified values and the relative standard deviat were in the range of 0. 54%-2.9%. The method was applicable to the determination of p the range of 0. 000 10%-0. 010% in high purity iron.
出处
《冶金分析》
CAS
CSCD
北大核心
2014年第3期61-64,共4页
Metallurgical Analysis
关键词
电感耦合等离子体原子发射光谱法
高纯铁
磷
磷钼杂多酸
甲基异丁基酮(MIBK)
萃取
inductively coupled phosphomolybdic heteropoly aci pl d
asma atomic emission spectrometry horus, there The system f high purity ions （n= 10） hosphorus in
high purity iron
phosphorus
methyl isobutyl ketone （MIBK）
extraction
