钇(Y)、钕(Nd)是变形镁合金铸锭中很重要的两种合金元素,因此准确测定变形镁合金铸锭中钇、钕的含量对产品性能开发具有重要意义。采用25 mL盐酸(1+1)在室温放置5 min溶解样品,选取Y 377.433 nm、Nd 401.225 nm作为钇、钕的分析谱线,采用基体匹配法绘制校准曲线以消除基体效应产生的影响,建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定变形镁合金扁铸锭中钇、钕的方法。结果表明:钇、钕校准曲线的线性相关系数均为0.999 9;方法中钇、钕的检出限分别为0.000 84%和0.000 73%,定量限分别为0.002 8%和0.002 4%。方法用于测定镁合金标准样品中钇、钕,结果与标准值相一致。按照实验方法测定3种变形镁合金扁铸锭样品中钇、钕,并进行精密度考察和加标回收试验,结果的相对标准偏差(RSD,n=6)为0.30%~1.3%,回收率为94%~101%。
Abstract
Yttrium(Y) and neodymium(Nd) are two important alloying elements in wrought magnesium alloy ingot.Therefore,the accurate determination of Y and Nd contents in wrought magnesium alloy ingot is of great significance for the product performance development.In this study,the samples were dissolved with 25 mL of hydrochloric acid(1+1) at room temperature for 5 min.Y 377.433 nm and Nd 401.225 nm were selected as the analytical lines for Y and Nd.The calibration curve was prepared by matrix matching method to eliminate the influence caused by matrix effect.A method for the determination of Y and Nd in wrought magnesium alloy flat ingot by inductively coupled plasma atomic emission spectrometry(ICP-AES) was established.The results showed that the linear correlation coefficients of calibration curves of Y and Nd were both 0.999 9. The limits of detection of Y and Nd were 0.000 84% and 0.000 73%,and the limits of quantification were 0.002 8% and 0.002 4%,respectively.The proposed method was applied for the determination of Y and Nd in magnesium alloy CRMs,the measurement results were consistent with the standard values.The contents of Y and Nd in three wrought magnesium alloy flat ingot samples were determined according to the experimental method,and the precision investigation and spiked recovery experiment were carried out.The relative standard deviations(RSD, n=6) of determination results were between 0.30% and 1.3%.The recoveries were between 94% and 101%.
关键词
电感耦合等离子体原子发射光谱法(ICP-AES) /
变形镁合金扁铸锭 /
钇 /
钕
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Key words
inductively coupled plasma atomic emission spectrometry(ICP-AES) /
wrought magnesium alloy flat ingot /
yttrium /
neodymium
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中图分类号：
O657.31
TF125.2+2
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脚注
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基金
国家标准修订(工信厅科函[2023]18号2023-0239T-YS);河南省市场监督管理局科技计划项目(2021sj35)
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