电感耦合等离子体原子发射光谱法测定镍基合金中铌

来源期刊：冶金分析2010年第8期

论文作者：朱莉

文章页码：58 - 61

关键词：电感耦合等离子体原子发射光谱法； 镍基合金； 铌

Key words：inductively coupled plasma atomic emission spectrometry； nickle-base alloy； niobium

摘    要：研究了样品溶解方法、铌元素分析线的选择,基体元素和主要共存元素钼、铬、铜、钨、铬、钛对铌测定的影响,并在优化的条件下实现了用电感耦合等离子体原子发射光谱(ICP-AES)法测定镍基合金中铌。结果表明:采用硫酸结合酒石酸溶解样品,根据干扰元素钒和钨的含量不同,择优选用309.418 nm,319.498 nm,316.340 nm谱线作为分析线并结合干扰校正技术可消除镍基合金中共存元素的干扰。使用该法测定了镍基合金标准物质中铌,分析结果与认定值一致,测定结果的相对标准偏差(n=6)在0.5%~6.4%之间。

Abstract: The sample-dissolution method,the selection of analytical line for niobium,and the effect of matrix and main coexisting ions (molybdenum,chromium,copper,tungsten,chromium and titanium) on the determination of niobium were investigated.Under the optimal conditions,the niobium in nickel-base alloy was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The results showed that the sample should be dissolved in sulphuric acid and tartaric acid.309.418 nm,319.498 nm and 316.340 nm were used as the analytical lines of niobium according to the different content of interference elements (vanadium and tungsten).The interference of coexisting elements in nickel-base alloy could be eliminated by combining the selection of analytical line with correction method.The proposed method has been applied to the determination of niobium in standard nickel-base alloy samples.The results were consistent with the certified values,with the relative standard deviation (RSD,n=6) of 0.5%-6.4%.