摘要
针对X射线荧光光谱法(XRF)压片法分析中非金属矿标样不能满足实际工作需要的情况,以四川峨边五渡钾长石矿为例,研究了如何根据非金属矿一级标样配制系列二级标样,以及如何根据二级标样对非金属矿粉末样品进行XRF压片法分析的方法。在采用X射线衍射分析(XRD)和化学分析法研究钾长石矿和一级标样矿物岩石学特征基础上,根据二级标样与待测样品的矿物岩石学特征相同相似原理,确定了非金属矿二级标样配制的基本方法和要求,即二者的矿物种类相同、矿物含量和化学成分相似,并适应待测样品成分的波动及矿物加工的需要,有利于XRF标准工作曲线的绘制;采用实验确定的非金属矿XRF压片法制样条件以及根据二级标样绘制的标准工作曲线,对钾长石矿的SiO2,Al2O3,Fe2O3,TiO2,MgO,CaO,K2O,Na2O等化学成分进行了XRF测试分析,其结果与化学分析法一致,说明本方法准确度较好,能够基本消除矿物效应的影响。
In order to solve the problem that standard samples of non-metallic minerals are not satisfactory in practical work by X-ray fluorescence spectrometer（XRF） analysis with pressed powder pellet,a method was studied how to make sub-standard samples according to standard samples of non-metallic minerals and to determine how they can adapt to analysis of mineral powder samples,taking the K-feldspar ore in Ebian-Wudu,Sichuan as an example.Based on the characteristic analysis of K-feldspar ore and the standard samples by X-ray diffraction（XRD） and chemical methods,combined with the principle of the same or similar between the sub-standard samples and unknown samples,the experiment developed the method of preparation of sub-standard samples： both of the two samples above mentioned should have the same kind of minerals and the similar chemical components,adapt mineral processing,and benefit making working curve.Under the optimum experimental conditions,a method for determination of SiO2,Al2O3,Fe2O3,TiO2,CaO,MgO,K2O and Na2O of K-feldspar ore by XRF was established.The determination results are in good agreement with classical chemical methods,which indicates that this method was accurate.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第5期1405-1409,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(50974025)
国家公益性行业科研专项经费项目课题项目(201011005-5)
国家教育部高等学校博士点基金项目(20095122110015)
国家人事部留学人员科技活动择优基金项目(川人社函[2010]32号)资助
关键词
非金属矿标样
钾长石
钠长石
石英
XRF压片法
Standard samples of non-metallic minerals
K-feldspar
Na-feldspar
Quartz
XRF with pressed powder pellet
