电感耦合等离子体原子发射光谱法测定铁铬铝合金中铝钛锆  

Determination of aluminum, titanium and zirconium in iron-chromium-aluminum alloy by inductively coupled plasma optical emission spectrometry

作　　者：周莉莉 董礼男 朱春要 张继明 ZHOU Lili;DONG Linan;ZHU Chunyao;ZHANG Jiming(Institute of Research of Iron and Steel,Shagang,Jiangsu Province,Zhangjiagang 215625,China)

机构地区：[1]江苏省(沙钢)钢铁研究院,江苏张家港215625

出　　处：《冶金分析》2022年第1期85-89,共5页Metallurgical Analysis

摘　　要：铁铬铝合金是非常重要的金属电热元件材料,铝、钛、锆含量对于其电学力学性能有非常重要的影响,因此需要准确测定其含量。采用盐酸-硝酸混合酸(体积比为4∶1)可以快速溶解铁铬铝样品,选择Al 308.215 nm、Ti 308.802 nm、Zr 256.887 nm作为分析谱线,采用基体匹配法消除基体效应影响,建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定铁铬铝合金中铝、钛、锆的方法。铝含量(质量分数,下同)在0.048%~5.0%、钛含量在0.006 0%~0.70%、锆含量在0.042%~0.70%范围内,铝、钛、锆元素校准曲线的相关系数均不小于0.999 9;各元素检出限为0.001 8%~0.014%。按照实验方法测定铁铬铝合金中铝、钛和锆,结果的相对标准偏差(RSD,n=6)为0.52%~1.5%,加标回收率为99%~103%。Iron-chromium-aluminum alloy is a vital material for electrothermal element. The content of aluminum, titanium and zirconiumin in iron-chromium-aluminum alloy is critical to its electrical and mechanical properties and should be accurately determined. The sample was dissolved with hydrochloric acid-nitric acid mixture(V∶V=4∶1). Al 308.215 nm, Ti 308.802 nm and Zr 256.887 nm were selected as the analytical spectral lines. The calibration curve was prepared by matrix matching method to eliminate the matrix effect. The determination method of aluminum, titanium and zirconium in iron-chromium-aluminum alloy by inductively coupled plasma optical emission spectrometry(ICP-OES) was established. When the mass fraction of aluminum was 0.048%-5.0%, the mass fraction of titanium was 0.006 0%-0.70% and the mass fraction of zirconium was in range of 0.042%-0.70%, the linear correlation coefficients of calibration curves were all not less than 0.999 9. The limits of detection of elements were in range of 0.001 8%-0.014%(mass fraction). The proposed method was applied for the determination of aluminum, titanium and zirconium in iron-chromium-aluminum alloy, and the relative standard deviations(RSD, n=6) were between 0.52%-1.5%. The recoveries were between 99% and 103%.

关 键 词：铁铬铝合金 电感耦合等离子体原子发射光谱法(ICP-AES) 铝 钛 锆 

分 类 号：O657.34[理学—分析化学] TF125.13[理学—化学]