Naslov
Characterization of Hyphenated HPIC/ICP-OES System Response for Iron Speciation in Natural Waters

Autori
Rončević, Sanda ; Steffan, Ilse

Izvornik
Atomic Spectroscopy (0195-5373) 25 (2004), 1; 125-132

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ICP-OES; specijacija; željezo; vezani sustavi
(ICP_OES; speciation; iron; hyphenated techniques)

Sažetak
The capability of hyphenated high performance ion chromatography coupled with inductively coupled plasma optical emission spectrometrxy(HPLC/ICP-OES) was investigated for iron speciation in natural water samples. A discrete sample intrroduction system produced transient singls to the ICP-OES detector. These signals were characterized through peak asymmetry factors.The elution of Fe(II) and Fe(III) from chromatographic columns using peak height and peak area values was found to be good. The elution of Fe(II) and Fe(III) from chromatographic columns using pyridine-2, 6-dicarboxylic acid was measured, and the results were satisfactory for most of the prominent iron emission line at 259.925 nm ; two resolved chromatographic peaks were detected by ICP-OES. The iron standard sulution stability was studied and fonud to be sufficient to allow the determination of total iron at very low concentration ranges. Speciation of iron in natural water samples was achived whit on-line preconcentration, and the measured concentration of Fe(III) and Fe(II) were 7.5 and 1.2 ng ml-1, respectively. The apperance of another iron species overlapping the peak of Fe(III) can probably be attributed to the bonding of Fe(III) with the organic componuds int the water samples.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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