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Fluorimetric determination of iron using 5-(4-methoxyphenylazo)-8-(4-toluenesulfonamido)quinoline

Zeng, Zuotao and Jewsbury, Roger A. (2000) Fluorimetric determination of iron using 5-(4-methoxyphenylazo)-8-(4-toluenesulfonamido)quinoline. The Analyst, 125 (9). pp. 1661-1665. ISSN 00032654

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A highly sensitive and relatively interference-free fluorimetric method for the determination of iron(III) is described. The method is based on the reaction between iron(III) and 5-(4-methoxyphenylazo)-8- (4-toluenesulfonamido)quinoline in the presence of cetyltrimethylammonium bromide. The fluorescence intensity (ex = 317 nm, em = 534 nm) is linear up to 3 µM (170 ng ml–1) iron(III) in aqueous solution with a repeatability (RSD) of 3.2% at a concentration of 180 nM (10 ng ml–1) and a detection limit (3s) of 2 nM (0.12 ng ml–1). The influence of reaction variables and the effect of interfering ions are reported. The proposed procedure was applied to the determination of trace amounts of iron(III) and total iron in tap water, canal water and wine samples without the need for preconcentration, pre-separation or organic solvent extraction

Item Type: Article
Subjects: Q Science > Q Science (General)
Schools: School of Applied Sciences
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Depositing User: Sara Taylor
Date Deposited: 16 Oct 2008 11:39
Last Modified: 28 Aug 2021 10:42


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