电感耦合等离子体发射光谱法测定铬铁矿中5种主量元素  

Simultaneous determination of 5 elements in chrome iron ore samples by inductively coupled plasma-optical emission spectrometry

作　　者：龚迎莉[1] 王宇 张宁[1] 谢莲英 

机构地区：[1]清华大学热科学及动力工程教育部重点实验室,北京100084 [2]利曼中国公司,北京100084 [3]华北石油勘探开发研究院,任丘062552

出　　处：《分析仪器》2014年第4期19-22,共4页Analytical Instrumentation

摘　　要：借助偏硼酸锂于1000℃熔融消解铬铁矿，超声波振荡提取，电感耦合等离子体发射光谱法测定铬铁矿中主量组分铬、硅、铁、镁、铝。5个元素的检出限为0.003～0.020μg/m L。采用基体匹配减少基体效应干扰，通过对国家一级铬铁矿标准物质GBW07820、GBW07202等测定验证，硅、铁、镁、铝测定值和标准值吻合，方法精密度（RSD ，n＝10）为：0.78～1.67％，加标回收率为101.6～105.3％。适于铬铁矿中SiO2、TFe、MgO、Al2 O3等4种常量组分的定量分析。过氧化钠熔融消解样品，电感耦合等离子体发射光谱法能够对铬进行定量分析。A method for the determination of 5 elements ,including Cr ,Si ,Fe ,Mg ,Al in chrome iron ore by inductively coupled plasma-optical emission spectrometry （ICP-OES） was applied.Samples were decom-posed with lithium metaborate under 1000℃ and dissolved with ultrasonic extraction. The detection limits of the five elements were 0.003 -0.020 μg/mL. Matrix matching was used to reduce matrix effect. Na-tional standard reference materials including GBW07820 ,GBW 07202 ,Si ,Fe ,Mg ,Al were in agreement with the slandard values with recovery of 101.6% -105.3% . The method is suitable for the chromite SiO2 ,T Fe ,M gO ,Al2 O3 4constant componeng in quantitative analysis.

关 键 词：电感耦合等离子体发射光谱法 偏硼酸锂 铬铁矿 

分 类 号：O657.3[理学—分析化学]