Development of ReferencElectrodes without Internal Liquid Leakage and Enamel Electrodes

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K04702
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26020:Inorganic materials and properties-related
• Research Institution: Mie University
• Principal Investigator: Hashimoto Tadanori 三重大学, 工学研究科, 准教授 (10271016)
• Co-Investigator(Kenkyū-buntansha): 石原 篤 三重大学, 工学研究科, 教授 (60212908) ; 那須 弘行 三重大学, 工学研究科, 准教授 (20189179)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: pH応答電極 / ガラス電極 / 金属電極 / 琺瑯電極 / 比較電極

Outline of Final Research Achievements

An Ag/AgCl reference electrode that is built into commercially available pH electrodes leaks its internal KCl solution via a liquid junction. This leakage is disadvantageous because the test solution is contaminated by a trace amount of the KCl solution. The applicability of Ag2O-TeO2 glasses to reference electrodes for pH sensors was investigated in this study. The effects of the Ag2O content and heat treatment on the pH sensitivity of these glasses and the pH sensitivity of the Ag2O-TeO2 glass/stainless steel electrodes were examined. The pH sensitivity of Ag2O-TeO2 glasses increased as the Ag2O content increased, but it was less than 40 % and was the lowest among the glasses that have been investigated to date. The 25Ag2O・75TeO2 glass/stainless steel electrodes precipitated cubic Ag and hexagonal Ag and showed relatively low pH sensitivities of 26 % and 5 %, respectively. Thus, the hexagonal Ag-precipitated samples were considered candidate reference electrodes for pH sensors.

Free Research Field

無機材料化学

Academic Significance and Societal Importance of the Research Achievements

FeBiGeガラスを作用電極，AgTeガラス/ステンレスを比較電極とする複合電極は，被検液を内部液で汚染しないので先端材料分野やバイオ・創薬関係での新しい強力なツールになり得る。