LJ Les plans d'experiences en spectrometrie d'absorption atomique : Application à la determination du selenium
Résumé
The optimisation of the determination of inorganic selenium by Hydride Generation/Quartz Furnace- Absorption Atomic Spectrometry was performed considering 12 operating parameters. The research of the influent factors was carried out from two experimental designs 24. Their realisation has allowed the determination of the operating conditions of the hydridation (HCI concentration and NaBH4 solution flow rate), the adjustment of the gas flow rates (He, O2 and H2) and consequently the control of the whole analytical process. The optimized method for the determination of inorganic selenium has been found to be sensitive, repeatable and reliable with absolute detection limits lower than 2 ng and relative standard deviations evaluated from 6 determinations ranging from 3 to 6%. © EDP Sciences, Wiley-VCH.