Multicalibrational procedure for more reliable analyses of ions at low analyte concentrations

Grzegorz Lisak, Ari Ivaska, Andrzej Lewenstam, Johan Bobacka

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    Pb2+-ISEs were used to demonstrate a new multicalibrational approach which gives comprehensive information about the response of a potentiomeric sensor. The method was used to study and optimize the non-equilibrium response of sensors, such as obtained with solid-contact ISEs used in time dependent conditioning procedure with recovery of the low detection limit at lowest analyte concentrations. The developed method allows better handling of non-equilibrium conditions in quantitative determinations of analytes. The multicalibrational approach with time optimization showed to be superior when compared to fixed measurement time approach using Pb2+-ISEs at non-equilibrium in the determination of lead(II) in environmental sample.
    Original languageUndefined/Unknown
    Pages (from-to)27–32
    Number of pages6
    JournalElectrochimica Acta
    Volume140
    Issue numberSpecial issue
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Keywords

    • ion-selective electrodes
    • non-equilibrium sensors
    • potentiometry

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