电感耦合等离子体原子发射光谱法测定铌钨合金中钽

doi:10.13228/j.issn.1000-7571.2014.06.010

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摘要研究了电感耦合等离子体原子发射光谱法(ICP-AES)测定铌钨合金中钽的条件并建立了一种快速测定方法。试样用硝酸和氢氟酸溶解, 选择干扰少、灵敏度较高、信噪比大的240.063 nm波长谱线作为钽的分析线, 基体元素铌、钨和共存元素锆、钼对测定的影响采用基体匹配的方法克服, 背景采用统一扣背景方法消除。方法的检出限为0.039 μg/mL, 测定下限为0.195 μg/mL。方法应用于铌钨合金样品中钽的测定, 相对标准偏差(RSD, n=12)为0.80%, 加标回收率在99%～101%之间, 钽的测定值与色层分离5-Br-PADAP分光光度法吻合。

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	王慧利

关键词 ：电感耦合等离子体原子发射光谱法(ICP-AES), 铌钨合金, 钽, 基体匹配

Abstract：The conditions for the determination of tantalum in niobium-tungsten alloy by inductively coupled plasma atomic emission spectrometry were investigated and a fast determination method was established. The sample was dissolved by nitric acid and hydrofluoric acid. Spectral line at 240.063 nm was chosen as analysis line of tantalum with small interference, high sensitivity and high signal noise ratio. Matrix matching method was employed to eliminate the impact of matrix elements including niobium and tungsten and coexisting elements including zirconium and molybdenum on the determination result. The background was eliminated by uniform deduction method. The detection limit of this method was 0.039 μg/mL and the limit of quantitation was 0.195 μg/mL. The method was used for the determination of tantalum in niobium-tungsten alloy with relative standard deviation (RSD, n=12) of 0.80% and recoveries of 99%-101%. The result was consistent with that obtained by chromatography 5-Br-PADAP spectrophotometry.

Key words： inductively coupled plasma atomic emission spectrometry (ICP-AES) niobium-tungsten alloy tantalum matrix matching

收稿日期: 2013-08-21

ZTFLH:

O657.31

作者简介: 王慧利(1985-), 女, 硕士, 主要从事电感耦合等离子体原子发射光谱分析工作;

引用本文:

王慧利. 电感耦合等离子体原子发射光谱法测定铌钨合金中钽[J]. 冶金分析, 2014, 34(6): 49-52. WANG Hui-li. Determination of tantalum in niobium-tungsten alloy by inductively coupled plasma atomic emission spectrometry. , 2014, 34(6): 49-52.

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http://47.93.29.245/Jweb_yjfx/CN/10.13228/j.issn.1000-7571.2014.06.010 或 http://47.93.29.245/Jweb_yjfx/CN/Y2014/V34/I6/49

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