富氧空气-乙炔火焰原子吸收光谱法测定地质样品中的钒  

Determination of Vanadium in Geological Samples by Air Mixed Oxygen-Acetylene Flame Atomic Absorption Spectrometry

作　　者：吴少尉[1] 葛文[1] 金萍[1] 陈文武[1] 杨明[1] 汤志勇[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：《岩矿测试》2003年第4期300-302,共3页Rock and Mineral Analysis

基　　金：中国地质大调查科技项目(DK0003048)

摘　　要：利用测试液中当铝离子浓度超过钒离子浓度两倍以上,铝对钒的吸收信号增感基本恒定,且能较好地克服其它元素的化学干扰,建立了富氧空气-乙炔火焰原子吸收光谱法测定地质样品中痕量钒的方法。方法的检出限LD为0.33mg/L。应用于国家一级地质标准物质中痕量钒的测定,结果与标准值相符。对GBW07303水系沉积物样品测定6次, w(V)=119.0μg/g,RSD为4.5%。A new method for determination of trace vanadium in geological samples by air mixed oxygen acetylene flame atomic absorption spectrometry is reported in this paper . When concentration of Al (Ⅲ) exceeds two times of V(Ⅴ) in sample solution, the signal enhancement from Al(Ⅲ) on signal of V(Ⅴ) is constant and the chemical interference from the coexisting elements can be minimized. The detection limit is 0.33 mg/L for vanadium. The method has been applied to the determination of trace vanadium in geological standard reference sample of GBW07303. The result is in agreement with certified value with precision of 4.5% RSD ( n =6).

关 键 词：富氧空气-乙炔火焰 原子吸收光谱法 地质样品 钒 

分 类 号：O657.31[理学—分析化学] O614.511[理学—化学]