【摘要】 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%。更多还原

【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%.更多还原