摘要
建立了应用电感耦合等离子体质谱法(ICP-MS)测定钒钛磁铁矿中Cr、Co、Ni、Cu和Ga元素含量的分析方法。对溶样体系进行了试验,确定采用HCl+HNO3+HF+HClO4溶解酸体系发烟溶解试样。在最佳的仪器工作参数条件下,考察了测定中潜在的质谱干扰及干扰程度,选择52Cr、60 Ni、59Co、63Cu和71 Ga为测量同位素。研究了基体效应及内标元素对测定的校正作用,结果表明,内标元素Sc的使用能有效的提高测量精密度,降低基体效应引起的信号强度漂移。方法的检出限为0.08～2.34ng/mL。方法应用于钒钛磁铁矿有证参考物质GBW07224、GBW07227和BH0103中铬钴镍铜镓的分析,测定值与认定值符合较好,相对标准偏差(n=6)不大于6.8%。
A method for determination of Cr,Co,Ni,Cu and Ga in vanadium titano-magnetite was established by inductively coupled plasma mass spectrometry（ICP-MS）.The sample dissolution system was discussed,and the acid system of HCl＋HNO3＋HF＋HClO4was selected to dissolve sample by fuming.Under the optimal instrumental working parameters,the potential spectral interferences and the interference state were investigated.Consequently,^52Cr,^60 Ni,^59Co,^63Cu and ^71 Ga was selected as determination isotopes.Matrix effect and the correction effect of internal standard elements on determination results were investigated.It was found that the application of internal standard element Sc could effectively improve determination precision and reduce signal intensity drifting caused by matrix effect.Detection limit of the method was 0.08-2.34ng/mL.The proposed method was applied to the determination of chromium,cobalt,nickel,copper and gallium in vanadium titano-magnetite certified reference materials,including GBW07224,GBW07227 and BH0103.The results were accordant with the certified values,and the relative standard deviation（RSD,n=6）was not more than 6.8%.
出处
《冶金分析》
CAS
CSCD
北大核心
2013年第6期9-13,共5页
Metallurgical Analysis
关键词
电感耦合等离子体质谱法
钒钛磁铁矿
铬
钴
镍
铜
镓
inductively coupled plasma mass spectrometry
vanadium titano-magnetite
chromium
cobalt
nickel
copper
gallium
