AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
|
|||||||
Rezumat articol ediţie STUDIA UNIVERSITATIS BABEÅž-BOLYAI În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului. |
|||||||
STUDIA CHEMIA - Ediţia nr.1 din 2006 | |||||||
Articol: |
FLAME ATOMIC EMISSION SPECTROMETRY DETERMINATION OF CESIUM IN MINERAL AND WELL WATERS USING A METHANE-AIR FLAME. Autori: LADISLAU KÉKEDY-NAGY, EUGEN DARVASI. |
||||||
Rezumat: Effects of flame composition, the observation height and the spectral bandpass of the monochromator on the emission of Cs in methane-air flame were studied and optimized. The best results were obtained using the 852.19 nm Cs line at the observation height of 11 mm, with the flame composition of 1.12 (relative stoichiometric units) and the slit width of 0.8 mm. The effect of Li, Na, K, Rb, Mg, Ca, Sr, Zn, Al and PO43- on the emission of Cs was studied too. The detection limit of 3 ± 1.4 μg.L-1 was obtained, in the presence of 200 mg.L-1 K, at a significance level of 0.05. The Cs content of mineral and well waters was determined without prior concentration by using both the external calibration and standard addition method. The results of these methods show good agreement implying the use of background correction. | |||||||