蓝晶石矿中氟钠镁铝硅铁钛钾钙元素的X射线荧光光谱分析  

Analysis of F,Na,Mg,Al,Si,Fe,Ti,K and Ca in Cyanite Ores by X-ray Fluorescence Spectrometry

作　　者：王梅英[1] 李鹏程[1] 李艳华[1] 李莹[1] 王留芳[2] 陈静[1] 

机构地区：[1]国土资源部贵金属分析与勘查技术重点实验室,河南省岩石矿物测试中心,河南郑州450012 [2]河南省地质矿产勘查开发局第二地质勘查院,河南许昌461000

出　　处：《岩矿测试》2013年第6期909-914,共6页Rock and Mineral Analysis

基　　金：河南省国土资源厅两权价款地质科研项目(2011-622-16)

摘　　要：蓝晶石的分析通常采用碱熔体系,重量、容量、比色、原子吸收光谱法、离子选择电极法等多种分析手段进行单独测定,对含有刚玉、金红石矿物的难熔性蓝晶石样品,这种分析方法常因熔矿不完全而导致测定结果偏低,而且分析手续冗长,操作复杂,不能满足地质测试的需要。本文采用玻璃熔融法制样,建立了X射线荧光光谱法同时测定蓝晶石矿中F、Na、Mg、Al、Si、Fe、Ti等主量元素的分析方法。以不同矿种的标准物质和自制含多种矿物组分的蓝晶石管理样拟合校准曲线,对玻璃熔融法的稀释比、熔矿温度及对F元素的影响因素等测定条件进行优化,确定选择样品与四硼酸锂-偏硼酸锂混合熔剂的稀释比为1∶10,在1050℃温度下实际样品熔矿完全,各元素的分析结果与化学分析法的测定值基本吻合。方法检出限小于0.05%,方法精密度(RSD,n=7)小于4.5%。本法操作简单,重现性好,准确可靠,解决了难熔样品的熔矿问题,同时也很好地解决了传统方法费时、耗材、不能同时测定多元素的问题。The analysis of cyanite ores usually uses the alkali fusion system and each component employs various analytical methods such as weight,capacity,colorimetric determination,Atomic Absorption Spectrometry and ion selective electrode method.This method not only leads to lower results because of the incomplete fusion of ores,but also has a long term analysis procedure and complicated operation for refactory cyanite ore samples containing corundum and futile,which renders it ineffective in meeting the needs of geological tests.The glass fusion method to prepare samples and establish an analysis method by using X-ray Fluorescent Spectrometry （XRF） to simultaneously determine the major elements in the cyanite ore is discussed and presented.The working curve was obtained by using various ores standard materials and self-made cyanite management samples containing many ore components.The determination conditions such as the glass fusion method（＇s） dilution ratio,ore fusion temperature and the effect to the element F were optimized.The chosen sample and the mixed solvent of lithium tetraborate and lithium metaborate were melted with dilution ratio of 1 ∶ 10 at the temperature of 1050℃.The results by XRF coincide with the determination values used in the chemical analysis method.The method detection limit is lower than 0.05％ and the method precision degree （RSD,n =7） is lower than 4.5％.This method has easy operation and good reproducibility and is accurate and reliable.The problem for the ore fusion method for refractory samples has been overcome and problems arising when using traditional method such as it being time consuming,wasteful of materials and unable to simultaneous determine all target elements have been solved.

关 键 词：蓝晶石矿 氟 主量元素 玻璃熔融制样 X射线荧光光谱法 

分 类 号：P578.945[天文地球—矿物学] O657.34[天文地球—地质学]