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Issue 7, 2018
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A colorimetric-dispersive solid-phase extraction method for the sensitive and selective determination of iron using dissolvable bathocuproinedisulfonic acid-intercalated layered double hydroxide nanosheets

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Abstract

In this research, a novel, simple, sensitive and selective method has been presented for the determination of iron using dissolvable bathocuproine disulfonic acid (BCS)-layered double hydroxides (LDHs) for dispersive solid-phase extraction (DSPE). Bathocuproine disulfonic acid (BCS)-intercalated MgAl-LDH nanosheets were successfully synthesized by a co-precipitation method. This was followed by an anion-exchange treatment. The extraction and colorimetric detection were based on the selective interaction of BCS-intercalated MgAl-LDH nanosheets with iron(II) and its color change. The color of BCS–iron(II)–MgAl-LDH could be easily observed with the naked eye, as it dissolved in acid to release the colored complex of iron(II), which was then directly introduced into a UV-vis spectrophotometer for analysis. The key parameters of the extraction were examined and optimized via a colorimetric method. Under the optimum conditions, a linear range of 0.5–100 μg L−1 was obtained with a good correlation coefficient of r2 = 0.9972 and a limit of detection of 0.4 μg L−1. The inter-day and intra-day relative standard deviations (RSDs) for six replicate determinations after the extraction of 50 μg L−1 were 2.9% and 4.1% respectively. The successful application of the proposed method was shown for the determination of iron in beverage and water samples.

Graphical abstract: A colorimetric-dispersive solid-phase extraction method for the sensitive and selective determination of iron using dissolvable bathocuproinedisulfonic acid-intercalated layered double hydroxide nanosheets

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Publication details

The article was received on 06 Nov 2017, accepted on 27 Feb 2018 and first published on 01 Mar 2018


Article type: Paper
DOI: 10.1039/C7NJ04282E
Citation: New J. Chem., 2018,42, 5489-5498
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    A colorimetric-dispersive solid-phase extraction method for the sensitive and selective determination of iron using dissolvable bathocuproinedisulfonic acid-intercalated layered double hydroxide nanosheets

    Y. Hamid and M. R. Fat’hi, New J. Chem., 2018, 42, 5489
    DOI: 10.1039/C7NJ04282E

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