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电感耦合等离子体原子发射光谱法测定锌铝合金中铋铬锰镍钛

Determination of bismuth, chromium, manganese, nickel and titanium in zinc-aluminum alloy by inductively coupled plasma atomic emission spectrometry

  • 摘要: 合金化是提升锌铝合金综合性能的关键途径,对其合金元素(铋、铬、锰、镍、钛)进行准确、快速的测定,对产品质量控制与高性能合金开发至关重要。本文采用王水(1+1)溶解样品,选取Bi 223.061 nm、Cr 267.716 nm、Mn 257.611 nm、Ni 231.604 nm、Ti 336.121 nm为铋、铬、锰、镍、钛的分析谱线,选用高纯锌进行基体匹配以消除基体效应,建立了电感耦合等离子体原子发射光谱法(ICP-AES)同时测定锌铝合金中铋、铬、锰、镍、钛5种合金元素含量的方法。各元素校准曲线线性相关系数均大于0.999 5;方法检出限为0.02~0.43μg/g。按照实验方法对3个锌铝合金标准样品和2个锌铝合金实际样品中铋、铬、锰、镍、钛含量进行了测定:锌铝合金标准样品的测定结果与标准值相吻合;实际锌铝合金样品中5种元素测定结果的相对标准偏差(RSD,n=8)为0.48%~1.9%,加标回收率为94%~106%。

     

    Abstract: Alloying is an important way to improve the comprehensive properties of zinc-aluminum alloy. The accurate and rapid determination of alloying elements(including bismuth, chromium, manganese, nickel and titanium) is crucial to the product quality control and the development of high-performance alloy. In this study, the sample was dissolved with dilute aqua regia. Bi 223.061 nm, Cr 267.716 nm, Mn 257.611 nm, Ni 231.604 nm and Ti 336.121 nm were selected as the analytical lines. High-purity zinc was used for matrix matching to eliminate the matrix effect. The method for the simultaneous determination of five alloying elements(bismuth, chromium, manganese, nickel and titanium) in zinc-aluminum alloy by inductively coupled plasma atomic emission spectrometry(ICP-AES) was established. The linear correlation coefficients of calibration curves for testing elements were all higher than 0.999 5. The limits of detection of this method were between 0.02 and 0.43 μg/g. The contents of bismuth, chromium, manganese, nickel and titanium in three certified reference materials of zinc-aluminum alloy and two zinc-aluminum alloy actual samples were determined according to the experimental method. The measurement results of certified reference materials were consistent with the certified values. For the actual samples, the relative standard deviations(RSD, n=8) of determination results ranged from 0.48% to 1.9%, and the spiked recoveries were between 94% and 106%.

     

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