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Magnesium Ion-Selective Optodes Based on a Neutral Ionophore and a Lipophilic Cationic Dye

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Abstract

Flow-through type magnesium ion-selective optodes based on a neutral ionophore and a lipophilic cationic dye have been developed. The optodes were prepared by coating pellicular octadecylsilica beads with a lipophilic organic liquid containing magnesium ionophores, a lipophilic cationic dye and a lipophilic anionic additive, and packing the beads into a flow-through optical cell. Two neutral magnesium ionophores (K22B5 and K22B1B5) and two novel lipophilic cationic dyes (KDC-1 and KDC-2) were synthesized and tested for preparing the optodes. Among the developed optodes, an optode based on the ionophore K22B1B5 and a cationic dye (KDC-2) produced the best magnesium ion optode with a relatively high Mg2+ sensitivity and selectivity. This optode showed a fast and reproducible response to magnesium ion, even in a high concentration of background ions.

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Authors and Affiliations

  1. Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama, 223, Japan

    Dwi Siswanta, Hideaki Hisamoto, Sayaka Sato, Yukihiro Matsumoto, Yasuhiro Koike & Koji Suzuki

  2. R&D Center, Biomedical Engineering Section, Nihon Kohden Corporation, 1-31-4, Nishiochiai, Shinjuku-ku, Tokyo, 161, Japan

    Shinji Yamamori

  3. Department of Chemistry, Gadjah Mada University, Sekip Utara, Jogjakarta, Indonesia

    Koji Suzuki

Authors
  1. Dwi Siswanta
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  2. Hideaki Hisamoto
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  3. Sayaka Sato
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  4. Yukihiro Matsumoto
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  5. Yasuhiro Koike
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  6. Shinji Yamamori
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  7. Koji Suzuki
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Siswanta, D., Hisamoto, H., Sato, S. et al. Magnesium Ion-Selective Optodes Based on a Neutral Ionophore and a Lipophilic Cationic Dye. ANAL. SCI. 13, 429–435 (1997). https://doi.org/10.2116/analsci.13.429

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  • DOI: https://doi.org/10.2116/analsci.13.429

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