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Hg(2+) detection using a disposable and miniaturized screen-printed electrode modified with nanocomposite carbon black and gold nanoparticles.

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      Abstract

      A miniaturized screen-printed electrode (SPE) modified with a carbon black-gold nanoparticle (CBNP-AuNP) nanocomposite has been developed as an electrochemical sensor for the detection of inorganic mercury ions (Hg(2+)). The working electrode surface has been modified with nanocomposite constituted of CBNPs and AuNPs by an easy drop casting procedure that makes this approach extendible to an automatable mass production of modified SPEs. Square wave anodic stripping voltammetry (SWASV) was adopted to perform Hg(2+) detection, revealing satisfactory sensitivity and detection limit, equal to 14 μA ppb(-1) cm(-2) and 3 ppb, respectively. The applicability of the CBNP-AuNP-SPE for the determination of inorganic mercury has been assessed in river water by a simple filtration and acidification of the sample as well as in soil by means of a facile acidic extraction procedure assisted by ultrasound.

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      Affiliations
      [1 ] Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy.
      [2 ] Consorzio Interuniversitario Biostrutture e Biosistemi "INBB", Viale Medaglie d'Oro, 305, Rome, Italy.
      [3 ] Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy. fabiana.arduini@uniroma2.it.
      [4 ] Consorzio Interuniversitario Biostrutture e Biosistemi "INBB", Viale Medaglie d'Oro, 305, Rome, Italy. fabiana.arduini@uniroma2.it.
      Journal
      Environ Sci Pollut Res Int
      Environmental science and pollution research international
      Springer Nature
      1614-7499
      0944-1344
      May 2016
      : 23
      : 9
      26803751 10.1007/s11356-016-6118-2 10.1007/s11356-016-6118-2

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