电感耦合等离子体原子发射光谱法测定高纯铁中痕量磷  

Determination of trace phosphorus in high purity iron by inductively coupled plasma emission spectrometry

作　　者：周西林 闫立东[2] 李芬[3] 田晓溪[2] 刘守琼 

机构地区：[1]重庆市计量质量检测研究院铝镁中心,重庆401121 [2]辽宁科技大学化学工程学院,辽宁鞍山114051 [3]重庆工业职业技术学院化学工程系,重庆401120

出　　处：《冶金分析》2014年第3期61-64,共4页Metallurgical Analysis

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.

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 

分 类 号：TG141[一般工业技术—材料科学与工程] O657.31[金属学及工艺—金属材料]