| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The purpose aimed has been achieved by showing that using an ionic liquid salt bridge (ILSB) enables the determination of pH defined in terms of the hydrogen ion activity of artificial seawater with the precision of 0.01 pH unit as 95 % confidence interval. Related technical problems to be solved for practical pH monitoring of seawater have been identified. In addition, other findings originally not intended include the stabilization of hydrogen ion in the high ionic strength HCl-NaCl mixtures, the dynamic transport of water through ILSB as a source of drifting the potential of the reference electrode, the unique correlation between the potential exhibited by the ILSB-equipped reference electrodes in water as well as ionic liquid with that of the standard hydrogen electrode, and the clarification of the nonthermodynamic measurability of pH on the basis of hydrogen ion activity through polemics.
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