Optimization of the determination of lithium using the methane-air flame as excitation source

被引：0
|
作者：
Nagy, LK [1 ]
Cordos, EA [1 ]
机构：
[1] Univ Babes Bolyai, Dept Chem & Chem Engn, R-3400 Cluj Napoca, Romania
来源：
REVUE ROUMAINE DE CHIMIE | 1998年 / 43卷 / 02期
关键词：
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of the flame and instrumental parameters on the emission of Li in the methane - air flame was studied. The aim was to achieve the highest signal-to-noise ratio and the lowest detection limit. The optimised parameters were: the flame composition, the observation height in the flame, the slit width of the monochromator. The best results were obtained with the Li line of 607.7 nm, at the observation height of 7 mm, with the flame composition of 1.12 (relative stoichiometric units) and the slit width of 0.6 mm. The detection limit of 0.19 mu g/L (ppb) was obtained at a significance level of 0.05, using the two-step Neyman-Pearson criterion.
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页码：111 / 116
页数：6
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