火焰原子吸收光谱法测定冰晶石中钠含量的方法研究  

Research on method for determination of sodium content in cryolite by flame atomic absorption spectrometry

作　　者：张莹莹 Zhang Yingying(Chinalco Testing Science&Technology(Zhengzhou)Co.,Ltd.,Zhengzhou 450041,China)

机构地区：[1]中铝检测科技(郑州)有限公司,河南郑州450041

出　　处：《轻金属》2025年第1期52-54,共3页Light Metals

基　　金：有色金属行业标准项目(2022-0800T-YS)。

摘　　要：高氯酸-盐酸处理冰晶石样品,在1%盐酸介质中选波长589.6 nm作为分析线,采用火焰原子吸收光谱仪测定冰晶石中钠的含量。结果表明,与330.2 nm相比,钠的分析线选择589.6 nm,可得到更好的准确度;盐酸对钠的测定产生负干扰,加入量选择1%,工作曲线中盐酸用量应和分析试液保持一致;共存元素对钠的测定无影响。校准曲线线性相关系数为0.999 2。方法检出限为0.007 5μg/mL,测定下限为0.075μg/mL。5个样品测定结果的相对标准偏差为0.46%~0.73%,回收率为98.56%~101.50%,分析结果与ICP-AES法分析结果吻合较好。The cryolite samples were treated by HClO 4-HCl mixed acid.The determination of sodium content in cryolite was analyzed by flame atomic absorption spectrometry(AAS),using hydrochloric acid solution at the concentration of 1%,with 589.6 nm as the detection wave length.The results showed that 589.6 nm was selected as the analytical lines compared with 330.2 nm,in order to get better accuracy.The hydrochloric acid had a negative interference on determination of sodium,and the content of hydrochloric acid with 1%in sample solution must be consistent with the working curve solution.The interference from coexisting elements on the determination of sodium can be ignored.The linear correlation coefficient of calibration curves was 0.9992.The detection limit of the method was 0.0075μg/mL,and the lower limit of determination was 0.075μg/mL.The relative standard deviation of the determination results of five samples was 0.46%~0.73%,and the recovery rate was 98.56%~101.50%.The analysis results were basically agreed with the results by inductively coupled plasma atomic emission spectrometry(ICP-AES).

关 键 词：火焰原子吸收光谱法 冰晶石 钠 

分 类 号：TF821[冶金工程—有色金属冶金]