稀酸分离-玻璃融片-X射线荧光法测定硫酸钡、硫酸锶  

DETERMINATION OF BARIUM SULFATE AND STRONTIUM SULFATE BY DILUTE ACID SEPARATION-GLASS MELTING-X-RAY FLUORESCENCE METHOD

作　　者：任楠 陈娜 REN Nan;CHEN Na(Testing Center of Geological,Geophysical and Chemical Exploration Institute,Yunnan Bureau of Nonferrous Geology,Kunming 650216)

机构地区：[1]云南省有色地质局地质地球物理化学勘查院测试中心,云南昆明650216

出　　处：《云南地质》2024年第S01期278-284,共7页Yunnan Geology

摘　　要：采用稀盐酸前处理样品,将溶解的样品经过滤分离,去掉铁、铅、锌等重金属元素,过滤后的残渣经高温灼烧,冷却后直接将样品转移至铂-金坩埚中,加入四硼酸锂-偏硼酸锂混合溶剂搅拌均匀,以硝酸铵为氧化剂,碘化铵和溴化锂为脱模剂,在融片机上1050℃~1100℃条件下熔融20分钟,熔融物在模具中成型冷却后放入X射线荧光光谱仪中,用预定好的程序进行测定,可以同时得到硫酸钡和硫酸锶的准确含量结果。相比于重量法和ICP-OES法,具有快速、简便、准确、多组分同时测定等优点。Samples were pretreated with dilute hydrochloric acid,and the dissolved samples were filtered to remove heavy metal elements such as iron,lead,and zinc.The residueafterdilute filtration was burned at high temperature,and then directlytransferred into a platinum-gold crucible after cooling.A mixture of lithium tetraborate and lithium metaborate was addedand stirred evenly.Ammonium nitrate was used as an oxidizer,while ammonium iodide and lithium bromide served as fluxing agents.The sample was melted for 20 minutes at 1050℃-1100℃ in a melting machine.After cooling and molding,the melted materialswere analyzed using an X-ray fluorescence spectrometer with a predetermined program,providing accurate results for both barium sulfate and strontium sulfate.Compared to the weight method and ICP-OES,this method offers advantages such as speed,simplicity,accuracy,and the capability to simultaneously determine multiple components.

关 键 词：硫酸钡 硫酸锶 X射线荧光光谱 玻璃融片 

分 类 号：P657.34[天文地球—地质学]