掺氧空气-乙炔火焰原子吸收光谱法测定地质样品中微量钡  

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

作　　者：刘汉东[1] 吴旺喜[1] 陈恒初[1] 吴少尉[2] 梅俊[2] 汤志勇[2] 金泽祥[2] 

机构地区：[1]江汉大学化学与环境工程学院,湖北武汉430019 [2]中国地质大学材料科学与化学工程学院,湖北武汉430074

出　　处：《岩矿测试》2002年第3期187-189,共3页Rock and Mineral Analysis

基　　金：原地质矿产部 95科技项目 (95 0 5 60 1-2 )

摘　　要：提出掺氧空气 -乙炔火焰原子吸收光谱法测定地质样品中微量钡的新方法。使用磺基水杨酸作保护剂消除铝对钡的挥发原子化干扰 ,KCl作消电离剂消除钡的电离干扰。方法的检出限 (K =3 )为 0 .0 4mg/L。方法已应用于测定地质标准样品中的微量钡 ,结果与标准值相符 ,对GBW 0 71 0 3试样测定 6次 ,RSD为 5 .4%。A new method for determination of trace barium in geological samples by oxygen air acetylene flame atomic absorption spectrometry is reported in the paper. The optimum determination condition has been selected. When suitable amounts of sulfosalicylic acid and KCl are added the interference effects from the coexisting elements can be minimized. The detection limit ( K =3) is 0.04 mg/L for Ba. The method has been applied to the determination of trace amounts of barium in geological standard sample GBW 07103. The result is in agreement with certified value with precision of 5.4% RSD ( n =6).

关 键 词：掺氧空气-乙炔焰 原子吸收光谱法 地质样品 钡 氯化钾 磺基水杨酸 

分 类 号：P575.4[天文地球—矿物学] O614.32[天文地球—地质学]