Development of a Microfluidic Device for Measurement of Distribution Behavior between Supercritical Carbon Dioxide and Water

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  • OHASHI Akira
    College of Science, Ibaraki University Frontier Research Center of Applied Atomic Sciences, Ibaraki University
  • SUGAYA Masahiro
    College of Science, Ibaraki University
  • KIM Haeng-Boo
    College of Science, Ibaraki University Frontier Research Center of Applied Atomic Sciences, Ibaraki University

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A measuring method for the distribution behavior between supercritical carbon dioxide and water by a microchip was developed. A surface modification of the microchannel by dichlorodimethylsilane induced a spontaneous phase separation of the supercritical carbon dioxide and aqueous phases in the microchip. The maximum contact time of the aqueous phase to the supercritical carbon dioxide phase was obtained as 0.58 s. This device withstood pressure up to 12.8 MPa. The distribution of tris(acetylacetonato)cobalt(III) (Co(acac)3) from the supercritical carbon dioxide phase to the aqueous phase in a microchannel could be measured. The concentration of Co(acac)3 distributed into the aqueous phase was increased by lengthening the contact time of both phases. These demonstrations showed that the method developed in this study could be used to measure the distribution behavior between supercritical carbon dioxide and water.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 27 (6), 567-, 2011

    社団法人 日本分析化学会

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