Potentiometric and spectrophotometric flow-injection determinations of metal ions with use of metal ion buffers

Nobuhiko Ishibashi, Toshihiko Imato, Kayoko Tsukiji

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    16 Citations (Scopus)

    Abstract

    Potentiometric and spectrophotometric flow-injection determinations of metal ions, based on metal ion buffers, are described. A copper(II) ion-selective electrode and copper(II) ion buffers containing nitrilotriacetic acid (NTA) or ethylenebis(oxyethylenedinitrilo)tetraacetic acid (EGTA) are used for determination of ca. 10-3 M transition metal ions or of calcium in the presence of magnesium. Spectrophotometric determination of transition metal ions is achieved by using a zinc ion buffer solution containing NTA and xylenol orange as indicator. Zinc concentrations up to 2 M can be determined by using large dispersion in the manifold. The factors influencing the sensitivity of the proposed methods are discussed.

    Original languageEnglish
    Pages (from-to)185-194
    Number of pages10
    JournalAnalytica Chimica Acta
    Volume190
    Issue numberC
    DOIs
    Publication statusPublished - 1986

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry
    • Biochemistry
    • Environmental Chemistry
    • Spectroscopy

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