A study on lowering the detection limit with solid-state lead-selective electrodes

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

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)


The detection limit of a Pb2+ ion-selective electrode with a solid state (PbS/Ag2S) membrane was successfully lowered to the nanomolar range. The electrode was applied in direct potentiometric determination of Pb2+ in aqueous solutions. Hydrodynamics, redox reaction at the solid-state surface as well as time dependency were investigated and found as key factors affecting the low detection limit. By optimizing these parameters improving detection limit by ca. three orders of magnitude was achieved. (C) 2010 Elsevier B.V. All rights reserved.
Original languageUndefined/Unknown
Pages (from-to)436–440
Number of pages5
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed


  • Solid-state lead-selective electrode
  • Direct determination of lead
  • Low detection limit

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