Vitamin B1 Sensitive Poly(vinyl chloride) Membrane Electrode Based on Hydrophobic Tetraphenylborate Derivatives and Their Application

Guo Hua Zhang, Toshihiko Imato, Nobuhiko Ishibashi, Yasukazu Asano, Takaaki Sonoda, Hiroshi Kobayashi

    Research output: Contribution to journalArticlepeer-review

    62 Citations (Scopus)

    Abstract

    A vitamin B1 sensitive poly(vinyl chloride) membrane electrode based on hydrophobic tetraphenyiborate derivatives is described. The sensing membrane contains an ion pair of vitamin B1-tetrakis[3, 5-bis(2-methoxyhexafluoro-2-propyl)-phenyl] borate (HFPB) or -tetrakis[3, 5-bis(trifluoromethyl)-phenyl] borate (TFPB) as a novel electroactive component, and it is plasticized with o-nitrophenyl octyl ether. The electrodes based on HFPB and TFPB exhibit Nernstian response down to 10−7.5 and 10−7 M vitamin B1 at pH 4, respectively. Response time is 5–10s for Increasing concentrations of sample solutions. Interferences from common Inorganic cations, some organic acids, and conventional dopes in oral solutions are negligible. The vitamin B1 electrode is successfully applied to the determination of vitamin B1 contents In an oral solution for both batch and flow infection systems. The results show good correlation with those obtained by conventional HPLC-UV detection with a coefficient of correlation of 0.99.

    Original languageEnglish
    Pages (from-to)1644-1648
    Number of pages5
    JournalAnalytical chemistry
    Volume62
    Issue number15
    DOIs
    Publication statusPublished - Aug 1990

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

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