Tuned galvanostatic polarization of solid-state lead-selective electrodes for lowering of the detection limit

Grzegorz Lisak, Tomasz Sokalski, Johan Bobacka, Leo Harju, Konstantin Mikhelson, Andrzej Lewenstam

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

24 Citeringar (Scopus)

Sammanfattning

Lowering of the detection limit of solid-state lead-selective electrodes was achieved by using the tuned galvanostatic polarization method. A Nernstian response was obtained down to nanomolar concentrations (low detection limit 10(-9) mol dm(-3) Pb2+). Good repeatability of the calibration curves was achieved by using a well established measuring procedure. Relatively high cathodic current densities were applied to the solid-state membrane in order to shorten the measurement time. Successful determination of lead in a synthetic sample (pPb(2+) = 7.97 +/- 0.08) was achieved by introducing an analytical protocol and favourably compared to inductively coupled plasma mass spectrometry (pPb = 7.93). By applying this method, a significant improvement in the detection limit of solid-state lead-selective electrodes was attained. (C) 2011 Elsevier BM. All rights reserved.
OriginalspråkOdefinierat/okänt
Sidor (från-till)1–6
Antal sidor6
TidskriftAnalytica Chimica Acta
Volym707
Utgåva1-2
DOI
StatusPublicerad - 2011
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • Solid-state membrane
  • Direct measurement of lead (II)
  • Low detection limit

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