Prediction of dissociation constants of ammonium ion in artificial seawaters and in concentrated sodium chloride solutions.

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概要

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• The dissociation constants of ammonium ion were determined at 25°C by potentiometry with glass and ammonium-ion-selective electrodes in artificial seawaters at various salinities (25–45\textperthousand) and in concentrated sodium chloride aqueous solutions (0.72–3.2 mol kg<SUP>−1</SUP>). The activity coefficients of ammonia in sodium chloride solutions of the same ionic strengths as those of the artificial seawaters and in the concentrated sodium chloride solutions, which were used for the theoretical estimation of the dissociation constants, were measured by a transpiration method. The dissociation constants were theoretically evaluated in terms of the ionic interaction model developed by Pitzer and co-workers, and compared with the experimental ones. The predicted dissociation constants showed a good agreement with the observed ones.

• 公益社団法人 日本化学会の論文

著者

• Maeda Masunobu

  Department Of Applied Chemistry Nagoya Institute Of Technology

• Ito Kaname

  Department Of Applied Chemistry Faculty Of Engineering Nagoya Institute Of Technology

• Ikeda Shoichiro

  Department Of Applied Chemistry Faculty Of Engineering Nagoya Institute Of Technology

• Hayashi Masato

  Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences

• Kinjo Yoshiaki

  Chemical Laboratory, College of Education, University of the Ryukyus

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