Analytical Sciences

Abstract − Analytical Sciences, 33(6), 739 (2017).

Application of a pH Electrode Incorporating an Ionic Liquid Salt Bridge to the Measurement of Rainwater Samples
Yota KUDO,* Manabu SHIBATA,** Satoshi NOMURA,** and Nobuaki OGAWA*
*Graduate School of Engineering and Resource Science, Akita University, 1-1 Tegata Gakuencho, Akita 010-8502, Japan
**HORIBA, Ltd., 2 Miyanohigashi, Kisshoin, Minami, Kyoto 601-8510, Japan
A pH electrode incorporating a reference electrode different from that in conventional electrodes was applied to the measurement of rainwater pH. The reference electrode utilizes a recently proposed ionic liquid salt bridge instead of a conventional potassium chloride salt bridge. The response time of this electrode was remarkably improved in rain sample pH measurements compared to that of conventional pH electrodes. In addition, the measured pH values of rain samples seemed to be more accurate with this electrode.