Abstract
In this study, fluorene 3-[2-(2-aminoethylamino)ethylamino]propyl trimethoxy silane functionalized nanoporous SBA-15 was incorporated into carbon paste electrode for the potentiometric detection of Cu2+ ions in aqueous medium. With 15.5 wt% FT-SBA-15 proportion, the developed electrode exhibited wide dynamic range of 1.0 × 10−6–1.0 × 10−2 mol L−1 toward Cu2+ with a detection limit of 5.0 × 10−7 mol L−1 and a Nernstian slope of 29.6 ± 1.0 mV decade−1. The electrode displayed rapid response (~44 s), long-term stability (more than 6 months) and high sensitivity. Moreover, the potentiometric responses could be carried out with a wide pH range of 3.9–6.6. Finally, the proposed electrode was successfully used as an indicator electrode in potentiometric titration of copper ions with EDTA and to determine the concentration of copper ions in seawater, tap water and black tea samples. The results showed a good correlation with the data obtained by graphite furnace atomic absorption spectrometry method.
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This work has been funded by Payame Noor University.
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Divsar, F., Isapour, N., Kefayati, H. et al. Fluorene functionalized nanoporous SBA-15 incorporated into carbon paste electrode for trace copper determination. J Porous Mater 22, 1655–1661 (2015). https://doi.org/10.1007/s10934-015-0049-z
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DOI: https://doi.org/10.1007/s10934-015-0049-z