原子吸收光谱法测定钼钠合金中高含量钠的方法研究  

Determination of High Content of Sodium in Molybdenum-Sodium Alloy by Atomic Absorption Spectrometry

作　　者：黄玲 张颖[1,2] Huang Ling;Zhang Ying(Analysis and Testing Center,Zhuzhou Cemented Carbide Group Corp.Ltd.,Zhuzhou Hunan 412000,China;State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China)

机构地区：[1]株洲硬质合金集团有限公司分测中心,湖南株洲412000 [2]硬质合金国家重点实验室,湖南株洲412000

出　　处：《硬质合金》2020年第1期69-73,共5页Cemented Carbides

摘　　要：本文研究建立了原子吸收光谱法测定钼钠合金粉末中高含量钠元素的方法。考察了合金基体以及消电离剂等用量对实验结果的影响,采用多级稀释法,基本消除了钼基体对钠测定结果的影响。试验确定过氧化氢溶剂与氯化铯消电离剂的最佳用量分别为5 mL和2 mL。针对钼钠合金中钠含量范围1%~5%,优选了分析波长,确定了最佳分析线为589.0 nm,在0~0.5μg/mL的钠浓度范围内,工作曲线具有良好的线性关系,相关系数达到0.999 9。探究了仪器的最佳工作条件,在该条件下对钼钠合金样品进行测定,钠的相对标准偏差小于3%(n=11);通过钼基体加标回收试验,加标回收率在98.1%~102.3%之间。本方法分析快速,准确度、精密度高,能满足生产过程中质量控制的要求。For the determination of high content of sodium in molybdenum sodium alloy powder,a method by atomic absorption spectrometry was developed.The influences of the amounts of alloy matrix and deionizer on the experimental results were investigated,and the multistage dilution method was adopted to basically eliminate the influence of molybdenum matrix on the determination of sodium.The optimal amount of hydrogen peroxide solvent and cesium chloride deionizer was determined to be 5 mL and 2 mL,respectively.According to the content range of sodium in sodium molybdenum alloy from1% to 5%,the analysis wavelength was optimized,and the optimal analysis line was determined to be 589.0 nm.Within the range of sodium content from 0 μg/mL to 0.5 μg/mL,the working curve has a good linear relationship,and the correlation coefficient reaches 0.999 9.The best working condition of the instrument was explored,the relative standard deviation of sodium is less than 3%(n=11) under this condition.Through the standard recovery test of molybdenum matrix,the standard recovery is between 98.1% and 102.3%.This method is rapid,accurate and precision,which can meet the quality control requirements during production process.

关 键 词：钼钠合金 钠元素 原子吸收光谱法 

分 类 号：O657.31[理学—分析化学] TG146.412[理学—化学]