钽内标X射线荧光光谱法测定钨精矿中WO_3  

Determination of WO_3 in tungsten concentrate using tantalum internal standard X-ray fluorescence spectrometry

作　　者：普旭力[1] 王鸿辉[1] 叶淑爱[1] 董清木[1] 朱桂容 王彩云[2] 魏丽英[2] 

机构地区：[1]厦门出入境检验检疫局,厦门361012 [2]厦门钨业有限公司,厦门361012

出　　处：《分析试验室》2010年第4期41-44,共4页Chinese Journal of Analysis Laboratory

基　　金：国家质检总局重大课题(2008IK265);厦门出入境检验检疫局课题(2007XK04)项目资助

摘　　要：提出了以钽为内标波长色散X射线荧光光谱法测定钨精矿中WO3的新方法。以Na2B4O7和Li2B4O7(质量比65:35)的混合物作为熔剂,Ta2O5为内标,同时加入LiNO3为氧化剂,在1200℃下进行熔融制样,最后将本方法应用于实际样品的分析,结果表明,以钽作为内标测定WO3,不仅可以在很大程度上降低实验操作和仪器测量带来的偏差,也可以消除基体效应的影响。方法用于测定白钨精矿和黑钨精矿中WO3,其准确度和精密度优于重量分析法。A method has been developed for the X-ray fluorescence determination of WO3 in tungsten concentrate.The samples are fused with mixture flux of sodium tetraborate and lithium tetraborate (65∶35) at 1200 ℃,and tantalum pentoxide was added as the internal standard.After cooling the cast bead,the W Lα and TaLα fluorescence emission intensity was determined by X-ray fluorescence spectrometry.The standard calibration beads were prepared with specpure tungsten trioxide.Tungsten contents of the samples are found by...

关 键 词：钨精矿 X射线荧光光谱法 内标法 熔融制样 

分 类 号：TF041[冶金工程—冶金物理化学]