电感耦合等离子体原子发射光谱法测定铜铬合金中镧  

Determination of lanthanum in copper-chromium alloy by inductively coupled plasma atomic emission spectrometry

作　　者：唐丽尖 杨红艳 陈梦祎 解紫嫣 TANG Lijian;YANG Hongyan;CHEN Mengyi;XIE Ziyan(Shaanxi Sirui Copper Alloy Innovation Center Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]陕西斯瑞铜合金创新中心有限公司,陕西西安710000

出　　处：《冶金分析》2024年第8期86-90,共5页Metallurgical Analysis

摘　　要：铜铬合金中加入镧元素可提高各项性能、降低偏析,但过量加入镧也会影响材料质量。实验采用分步加入盐酸和硝酸溶解样品,选择镧的分析谱线为La 408.672 nm,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定铜铬合金中镧。镧在质量浓度为0.050~2.00μg/mL范围内与发射强度呈较好的线性关系,线性相关系数为0.999 97;方法的检出限为0.000 27%。考察了基体效应和共存元素的干扰,结果表明,铜铬合金中铜基体和其他元素对镧的测定无显著影响。采用实验方法测定铜铬合金样品中镧,结果的相对标准偏差(RSD,n=11)为1.5%~2.0%;加标回收率为96%~104%。The addition of lanthanum in copper-chromium alloy can improve the alloy properties and reduce the segregation.However,the material quality can be also affected if excessive lanthanum is added.In this study,the sample was dissolved by adding hydrochloric acid and nitric acid stepwise.La 408.672 nm was selected as the analytical spectral line,and the content of lanthanum in copper-chromium alloy was deter-mined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The mass concentration of lanthanum in range of 0.050-2.00μg/mL had a good linear relationship with the corresponding emission in-tensity,and the linear correlation coefficient was 0.99997.The limit of detection of method was 0.00027%.The interference of matrix effect and coexisting elements was investigated,and the results showed that the cop-per matrix and other elements in copper-chromium alloy had no significant influence on the determination of lanthanum.The content of lanthanum in copper-chromium alloy sample was determined according to the experimental method.The relative standard deviations(RSD,n=11)of the results were between 1.5%and 2.0%.The recoveries were between 96%and 104%.

关 键 词：铜铬合金 稀土元素 镧 电感耦合等离子体原子发射光谱法(ICP-AES) 

分 类 号：O657.31[理学—分析化学] TF031[理学—化学]