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Determination of trace uranyl in saline samples using chelation ion chromatography

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Paull, B and Haddad, PR 1998 , 'Determination of trace uranyl in saline samples using chelation ion chromatography' , Analytical Communications, vol. 35, No. 1 , pp. 13-16 , doi: 10.1039/a707971k.

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Abstract

A liquid chromatographic method for the determination of trace levels of UO22+ in highly saline samples has been developed. A polystyrene divinylbenzene reversed-phase column was impregnated with methylthymol blue, resulting in a chelating stationary phase. An isocratic method, using a 0.5 M KNO3, 40 mM HNO3 eluent, allowed the direct injection of up to 0.2 ml of a saline sample, with UO22+ eluting away from the sample matrix peak in under six minutes. The development of an eluent step gradient procedure, using a step up from 6 mM HNO3 to 60 mM HNO3, allowed sample injection volumes of up to 2 ml without substantial peak broadening and resulted in a detection limit for UO22+ of less than 1 µg l–1, in samples containing massive excesses of matrix metals. The procedure was applied to the determination of trace UO22+ in a saturated saline Antarctic lake sample. The results obtained compared well with those obtained using ICP-MS.

Item Type: Article
Authors/Creators:Paull, B and Haddad, PR
Journal or Publication Title: Analytical Communications
ISSN: 1359-7337
DOI / ID Number: 10.1039/a707971k
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© Royal Society of Chemistry 1998.

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