混合硼酸锂盐熔融-混酸消解-ICP-MS测定伟晶岩样品中的稀土、铀、钍等元素  

Determination of REE,U,Th and Other Elements in Pegmatite Samples by ICP-MS Using Mixed Lithium Borate Fusion-Mixed Acids Digestion

作　　者：李黎 郭冬发[1] 黄秋红[1] 李伯平[1] 王娅楠 谢胜凯[1] 刘瑞萍[1] LI Li;GUO Dongfa;HUANG Qiuhong;LI Boping;WANG Yanan;XIE Shengkai;LIU Ruiping(Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2022年第2期361-369,共9页Uranium Geology

基　　金：核能开发项目“高精度热电离质谱仪关键技术研究及设备研制”(编号:测H2002)和“多接收电感耦合等离子体质谱仪关键技术研究及设备研制”(编号:测HDJS2102)联合资助

摘　　要：将偏硼酸锂与四硼酸锂混合熔剂高温熔融伟晶岩样品形成的玻璃,于硝酸、盐酸、氢氟酸的混合液中进行快速消解后,采用电感耦合等离子体质谱仪测定了其中的Ga、Sr、Th、U和稀土元素。方法检出限为0.03~0.91μg/g,相对标准偏差(RSD)优于5%。经国家标准物质验证,待测元素的测定值与推荐值的相对误差在0.07%~25%之间,满足地质矿产行业标准(DZ/T0130—2006)中的相对误差允许限要求。将本方法应用于实际样品分析,分析结果与酸溶法结果基本一致。该方法从前处理到上机测试能在48 h内完成,极大地提高了分析效率,适用于包括伟晶岩在内的地质样品中稀土、铀、钍、镓、锶元素含量的快速测定。Ga,Sr,Ba,Th,U and rare earth elements in pegmatite samples were determined by ICP-MS using lithium metaborate and lithium tetraborate fusion followed nitric acid,hydrochloric acid and hydrofluoric acid digestion.The detection limit was 0.03~0.91μg·g^(-1),and the relative standard deviation was better than 5%.Moreover,the relative error between measured results and recommended values of certified reference materials was 0.07%~25%,which meet the requirements of the geological and mineral industry standards(DZ/T0130—2006).For the analysis of actual samples,the analysis results were almost consistent with acid digestion.Furthermore,the method can be completed within 24 hours pre-processing to testing,which greatly improves the efficiency and is suitable for the rapid determination of REE,U,Th,Ga,Sr in geological samples including pegmatite.

关 键 词：混合硼酸锂盐熔融 混酸消解 伟晶岩 ICP-MS 元素含量 

分 类 号：O657.63[理学—分析化学]