著者

井上 正義 田中 廣義 島 和弘 稲津 邦平

出版者

公益社団法人 日本薬学会

雑誌

YAKUGAKU ZASSHI (ISSN:00316903)

巻号頁・発行日

vol.105, no.3, pp.289-295, 1985-03-25 (Released:2008-05-30)

参考文献数

16

被引用文献数

1 1

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The effect of organic solvent on the growth rate of cephalothin sodium (KF) after seeding in frozen solution was investigated. All of used solvents accelerated crystal growth of KF and it was found that the accelerative effect of solvent increased with an increase in dielectric constant of solvent. KF formed micelle in aqueous solution and the solvent lower the freezing temperature of the micelle and it can be assumed that the lowering of the freezing temperature of the micelle related to the volume of solvent existing in the micelle. Alcohol lower larger the freezing temperature of the micelle than ketone and nitrile, but the accelerative effect of alcohol on the growth rate was less than that of ketone and nitrile. The effect of the concentration of ethanol and acetone was investigated and it seemed that ethanol accelerated nucleation. Nevertheless, the accelerative effect of ethanol on the growth rate was less than that of acetone. These results suggested that simultaneous use of solvent having a different mode of action is effective for crystallization of KF in frozen solution by spontaneous nucleation.