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Determination of mercury cation using modified graphene oxide with specific mercury aptamer as adsorbent for microextraction in packed syringe (MEPS)

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Abstract

In this project, a nanosorbent was prepared using graphene oxide nanosheets modified with a specific mercury aptamer to detect very low mercury concentrations in aqueous solutions. The properties of the prepared nanosheets as adsorbents in the adsorption of mercury cations by microextraction in a packed syringe and analysis with a spectrophotometer were evaluated. Scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray energy diffraction were used to characterize the nanosheets obtained. The optimization conditions affecting the extraction and determination of mercury by spectrophotometry such as the influence of the pH of the aqueous solution, the number of sample loading times, the number of desorption times, the contact time of the analyte with the adsorbent, the amount of adsorbent and the volume of wash solvent were investigated. Under optimization conditions, the calibration curve of the method was linear between 20 and 800 μg L−1, and the detection limit of the method was 2.2 μg L−1. Mercury analysis in real samples such as Gavoshan dam water, Gamasiab river water and Bashir Taq Bostan spring water was also investigated to evaluate the method.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, Iran

    Hadis Dehghani & Soleiman Bahar

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  1. Hadis Dehghani
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  2. Soleiman Bahar
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Dehghani, H., Bahar, S. Determination of mercury cation using modified graphene oxide with specific mercury aptamer as adsorbent for microextraction in packed syringe (MEPS). J IRAN CHEM SOC 21, 1413–1422 (2024). https://doi.org/10.1007/s13738-024-03008-8

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