偏硼酸锂熔融-电感耦合等离子体原子发射光谱法测定地质样品中二氧化硅等12个成分量

Determination of 12 Components in Geological Samples by Lithium Metaborate Fusion-Inductively Coupled Plasma Atomic Emission Spectrometry

使用热解石墨坩埚作为熔样器皿,地质样品经无水偏硼酸锂熔剂熔融分解,用王水溶液经过超声波振荡溶解熔盐。为了消除基体效应和仪器波动的影响,分取溶液后加入一定量的内标镉。用电感耦合等离子体原子发射光谱法对6个国家一级标准物质GBW07301a、GBW07365、GBW07408、GBW07452、GBW07107、GBW07121进行分析测定,方法精密度(RSD)<2%,准确度(RE)<7%,能够满足样品分析中各元素定量分析的要求。

Pyrolytic graphite crucible was used as the melting vessel. The sample was melted and decomposed by anhydrous lithium borate flux, and the molten salt was dissolved by ultrasonic oscillation with aqua regia solution.In order to eliminate the influence of matrix effect and instrument fluctuation, a certain amount of internal standard cadmium was added after the solution was separated. Six national primary standard substances GBW07301 a, GBW07365, GBW07408, GBW07452, GBW07107 and GBW07121 were analyzed and measured by inductively coupled plasma atomic emission spectrometry. The precision(RSD) and accuracy(RE) of the method were lower than 2% and 7% respectively, which could meet the requirements of quantitative analysis of each element in sample analysis.