ELECTROCHEMICAL FORMATION OF HETEROPOLYMOLYBDATE ANIONS AT THE OIL/WATER INTERFACE AND ITS APPLICATION TO OXOANION SENSORS

TOSHIYUKI OSAKAI; HAJIME KATANO; SADAYUKI HIMENO; ATSUYOSHI SAITO

doi:10.2116/analsci.7.Supple_1657

TOSHIYUKI OSAKAI, HAJIME KATANO, SADAYUKI HIMENO, ATSUYOSHI SAITO

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Keywords: heteropolymolybdate anion, oxoanions, orthophosphate ion, oil/water interface, voltammetric ion sensor

JOURNAL FREE ACCESS

1991 Volume 7 Issue Supple Pages 1657-1658

DOI https://doi.org/10.2116/analsci.7.Supple_1657

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Abstract

When an isopolyanion (MO₆O₁₉^2-) transfers from nitrobenzene (NB) to water (W), the anion rapidly decomposes in W to liberate Mo(VI), which subsequently forms heteropoly complexes with orthophosphate, silicate, arsenate and germanate ions. As an application, a voltammetric sensor for orthophosphate ion has been developed. The sensor shows a current response proportional to the orthophosphate concentration in the range from 0.02 to 0.5mM.

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