火焰原子吸收光谱法测定钽铌尾矿中的钾和钠  

Determination of potassium and sodium in tantalum-niobium tailings by flame atomic absorption spectrometry method

作　　者：谷娟平 曾志平 黄环 GU Juanping;ZENG Zhiping;HUANG Huan(China Nonferrous Metals(Guilin)Geology And Mining Co.,Ltd.,Guilin 541004,Guangxi,China)

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2024年第3期589-593,共5页Mineral Resources and Geology

摘　　要：文章建立了火焰原子吸收光谱法测定钽铌尾矿中钾和钠元素含量的分析方法。试样经硝酸、氢氟酸和硫酸溶解后,加入氯化锶消除测定钾和钠时的电离干扰及钾钠之间的相互干扰,以盐酸为介质,用火焰原子吸收光谱法连续测定钾和钠。该方法钾、钠的检出限分别为0.047 mg/L,0.015 mg/L,特征浓度钾为0.053 mg/L/(1%A),钠为0.026 mg/L/(1%A),方法的精密度钾为1.53%~2.14%,钠为1.30%~1.91%,样品加标回收率钾为96.7%~102.0%,钠为96.4%~103.3%,表明该方法具有较高的灵敏度、精密度和良好的准确度,能够满足铌钽尾矿中钾和钠元素含量的测定。The determination method of potassium and sodium in tantalum-niobium tailings by flame atomic absorption spectroscopy has been developed.After the samples are dissolved by nitric acid,hydrofluoric acid and sulfuric acid,the ionization interference and mutual interference between potassium and sodium are eliminated by adding strontium chloride,the potassium and sodium are continuously determined by flame atomic absorption spectrometry using hydrochloric acid as medium.The detection limits of potassium and sodium are 0.047 mg/L and 0.015 mg/L,respectively.The characteristic concentrations of potassium and sodium are 0.053 mg/L(1%A)and 0.026 mg/L(1%A),respectively.The precision degree of potassium and sodium are 1.53%~2.14%and 1.30%~1.91%,respectively,the recoveries of potassium and sodium are 96.7%~102.0%and 96.4%~103.3%,respectively,the experiment result shows that the method has high sensitivity,precision and accuracy,and can satisfy the determination of potassium and sodium in niobium and tantalum tailings.

关 键 词：火焰原子吸收光谱法 钽铌尾矿 钾 钠 

分 类 号：P575.3[天文地球—矿物学]