摘要
Air-C<sub>2</sub>H<sub>2</sub> FAAS测定铍导致灵敏度低的原因主要是:（1）在火焰中形成了难熔的、高沸点的铍氧化物;（2）Air-C<sub>2</sub>H<sub>2</sub>火焰本身的温度低,不足以使铍氧化物产生显著的、有效的热解原子化;（3）Air-C<sub>2</sub>H<sub>2</sub>火焰本身的还原性很弱,难以产生有效的化学还原作用,并难以有效地消耗火焰中过剩的活性原子氧,以保护铍不再被氧化,因而在该火焰中Be的原子化效率很低(β=4×10<sup>-5</sup>)。针对上述原因,作者认为。
The methods of improving analytical performance of measuring Be in Air-C_2H_2 flame with AAS are inquired into this paper. Influences of Ca, Mg, St, Ba etc. upon Be and enhancing effect of Mg upon Be are studied, meanwhile, influences of Ca, Sr, Ba, Al etc. fourteen types of ions upon Be-Mg system are studied. Coexistent concentration range allowed are given when containing Mg at 500μg/ml solution. Standard curve of Be are obtained linear range from 0 to 200μg/ml respectively sensitivity (1% absorption) and limit of detection are 7.6μg/ml and 4.8μg/ml solution.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期56-58,19,共4页
Spectroscopy and Spectral Analysis
