电感耦合等离子体发射光谱法多向观测同时测定碳酸盐中常量和微量元素

采用偏硼酸锂熔矿分解试样,稀盐酸提取,电感耦合等离子体发射法同时测定碳酸盐中二氧化硅、氧化钙、氧化镁、三氧化二铝、三氧化二铁、氧化钾、氧化钠、氧化锰、二氧化钛、五氧化二磷、三氧化硫等多种常量和微量组分。各元素选择光谱干扰少、准确度高的多向观测方式(轴向、径向衰减),改善方法的检出限和精密度。方法回收率为94.7%~104.6%,相对标准偏差(RSD,n=10)低于3.0%。方法经国家一级标准物质验证,测定值与标准值基本相符。

Simultaneous Determination of Major and Minor Elements in Carbonates by Inductively Coupled Plasma-Atomic Emission Spectrometry with Multi-direction Viewing Mode

A method for the determination of major and minor elements, including SiO2, CaO, MgO, Al2O3, Fe2O3, K2O, Na2O, MnO, TiO2, P2O,5 and SO3, in carbonate samples by inductively coupled plasma-atomic emission spectrometry (ICP-AES) with multi-direction viewing mode was reported. The samples were fused with lithium metaborate and the sample beads were then leached with dilute HCI solution. The detection limits and the analytical precision for the target elements were remarkably improved by carefully choosing the measurement spectral lines and using multi-direction viewing mode for observation. The recoveries for the elements ranged from 94.7% to 104.6% with the precision of less than 3.0% RSD (n = 10). The method has been applied to the determination of these elements in National Standard Reference Materials and the results are in agreement with the certified values.