摘要
采用过氧化钠熔融或偏硼酸锂熔融分解样品 ,将提取液碱性沉淀 ,通过过滤分离掉大量熔剂 ,再将沉淀用酸复溶后用等离子体质谱测定 2 6个元素。通过对比 ,偏硼酸锂熔融 -酸提取 -碱性沉淀的方案 ,空白低 ,易操作 ,成本低 ,大多数元素测定结果的相对误差 <1 0 %,相对标准偏差 <5 %(n =1 0 ) 。
A method for multi element determination in geological samples by ICP MS after fusion precipitation treatment was developed. Geological samples were fused with sodium peroxide (Na 2 O 2 )or lithium metaborate (LiBO 2 ) . After dissolution of the fusion cake, the analytes were precipitated in the alkaline solution and sodium, lithium and boron were separated by filtration. The precipitates were then dissolved by acid and 26 elements in the sample solution were determined by ICP MS. The results show that the procedure of lithium metaborate fusion acid dissolution sodium hydroxide precipitation is preferable by its low blank value, easy operation and low cost. The method has been verified by the determination of 26 elements in geological standard reference materials and geological samples. The results are in agreement with certified values with less than 10% relative error (RE) and precision of 5% relative standard derivation (RSD, n =10).
出处
《岩矿测试》
CAS
CSCD
北大核心
2003年第2期86-92,共7页
Rock and Mineral Analysis
基金
国土资源部地质大调查实施项目 (2 0 0 2 6 0 1 9)
国土资源部地质大调查项目 (DKD990 4 0 1 3)
