インピーダンス計測による電解質水溶液の共晶凝固判別

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タイトル別名
  • Detection of Eutectic Solidification during Freezing of Electrolyte Solutions by Electric Impedance Measurement
  • インピーダンス ケイソク ニ ヨル デンカイシツ スイヨウエキ ノ キョウショウ ギョウコ ハンベツ

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A feasibility study was carried out to develop a technique for detecting the occurrence of eutectic solidification of electrolyte solutions, which is a potential cause of cellular damage during freezing of cells and tissues. The electric impedance of a sodium chloride or a potassium chloride aqueous solution between two parallel electrodes was measured at subzero temperatures as a function of the frequency ranged from 1 to 105 Hz. The impedance increased abruptly with decreasing temperature near the eutectic point, suggesting the possible detection of eutectic solidification. Some extent of supercooling was observed before the eutectic solidification, while the impedance drop agreed well with the eutectic temperature during thawing.

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