富氧空气-乙炔火焰原子吸收光谱法测定地质样品中痕量铍  

Determination of Trace Beryllium in Geological Samples by Oxygen Doped Air-Acetylene Flame Atomic Absorption Spectrometry

作　　者：吴少尉[1] 杨小秋[1] 陈文武[1] 杨明[1] 汤志勇[1] 金泽祥[1] 

机构地区：[1]中国地质大学材料科学与化学工程学院

出　　处：《光谱学与光谱分析》2005年第5期785-787,共3页Spectroscopy and Spectral Analysis

基　　金：国家地质调查局科技项目(DK0003048)资助

摘　　要：研究了用富氧空气乙炔火焰原子吸收光谱法测定铍的分析方法。当空气流量为6.0L·min-1,氧气流量为4.2L·min-1,乙炔流量为7.4L·min-1时铍有较高的吸光度。在2.5%的8羟基喹啉介质中,能较好地消除基体干扰且有一定的增感作用。方法的检测限为0.006μg·mL-1,测定精密度RSD为4.69%,测定地质标准物质中铍的结果与鉴定值吻合。A new method for the determination of trace beryllium in geological samples by oxygen-air-acetylene flame atomic absorption spectrometry is reported in the present paper. The optimum determination conditions were selected. When suitable amounts of 8-hydroxyquinoline are added, the interference effect from the coexisting elements can be minimized and the sensitivity for the determination of beryllium can be increased. The detection limit(k = 3) is 0.006 mu g center dot mL(-1) for beryllium. The method has been applied to the determination of trace beryllium in geological standard samples, and the results are in good agreement with the certified values with a precision of 4.69% RSD(n = 8).

关 键 词：富氧空气-乙炔火焰 原子吸收光谱法 地质样品 铍 

分 类 号：O657.3[理学—分析化学]