熔融法制样-X射线荧光光谱法测定高含量铷矿石中的氧化铷  

Determination of Rubidium Oxide in High Content Rubidium Ores by X-ray Fluorescence Spectrometry with Fusion Method

作　　者：陶丽萍[1] 石华[1] 赵玉卿[1] TAO Liping;SHI Hua;ZHAO Yuqian(Qinghai Provincial Geological Test Aapplication Center,Xining,Qinghai 810008,China)

机构地区：[1]青海省地质矿产测试应用中心,西宁810008

出　　处：《中国无机分析化学》2018年第6期46-49,共4页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：铷矿石和混合熔剂按照一定的质量比混配好,在熔样机中制备成待分析的样品,混合熔剂由四硼酸锂+偏硼酸锂+氟化锂按照一定比例混合而成,通过对国家标准物质不同质量的稀释或者在其中添加纯物质的办法制备成一系列的含不同氧化铷的标准系列样片,采用X射线荧光光谱仪直接测定氧化铷的含量。方法的测定范围0.01%～5.0%,相对标准偏差(RSD)小于1.5%,同时对标准样品的种类要求少,而通过某一标准物质来制备校正曲线也可以克服基体效应的影响。方法适应于稀有矿石类标准物质数量和种类矿石不多的分析,对国家一级标准物质分析准确度高。The rubidium ore and mixed flux were mixed well by the certain mass ratio.The samples were prepared in the fusion machine.The mixed flux was composed of four lithium borate,lithium meta borate,lithium fluoride in a certain proportion.A series rubidium oxide standard samples with different content were prepared by the dilution of national standard material or the addition of pure substance.The content of rubidium oxide was directly tested by X fluorescence spectrometer.The analysis method had a wide range of detection range,from 0.01% to 5%,the precision RSD reached to 1.5%.The standard samples are less required,and the preparation of the calibration curve through a certain standard material can also overcome the effect of the matrix effect.This method is suitable for the analysis of the quantity and type of rare mineral reference materials,especially for analysis of the national first class standard with high accuracy.

关 键 词：铷矿石 混合熔剂 质量稀释 熔融法 X射线荧光光谱法 

分 类 号：O657.34[理学—分析化学] TH744.15[理学—化学]