摘要
本文研究了用富氧空气 乙炔火焰原子吸收光谱法测定钡 ,比较了乙炔流量、氧气流量及氧炔比的影响 ,当混合空气中含氧量为 5 2 % ,氧炔比为 0 72时对钡有较高的灵敏度。在此火焰中 ,不同浓度的各种酸及大多数金属离子对钡的测定干扰较少 ,当溶液中引入 10 0 0mg·L- 1 K时 ,具有最大的增感及消除干扰的效应。方法的检出限为 0 0 34mg·L- 1 ,灵敏度为 0 16mg·L- 1 / 1% ,相对标准偏差为 2 5 %。
In this paper, the determination of Ba using oxygen enriched air-acetylene flame in AAS has been studied and the effect of acetylene flow, oxygen flow and the ratio of O-2/C2H2 on the absorbance have been compared. When the amount of oxygen is 52% in mixed gas and the ratio of O-2/C2H2 is about 0.72, higher sensitivity for Ba can be obtained. In this flame acids and most of elements did not interfere. By adding 1000 mg(.)L(-1) K the interference can be minimized and the sensitivity for the determination of Ba can be increased. The sensitivity of the method is 0.16 mg(.)L(-1)/1%, the detection limit is 0.034 mg(.)L(-1), and the relative standard deviation is 2.5%. The analytical results of the standard reference material (GBW08301 and GSD-6) by this method are consistent with the certified valus, and it was proved that this method are reliable and is suitable for the determination of Ba in mineral water.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期146-148,共3页
Spectroscopy and Spectral Analysis
