50 μLから測定可能なpH電極用応答ガラスの作製

• Published in: Bunseki kagaku Vol. 68; no. 2; pp. 103 - 108
• Main Authors: 立石, 一希, 金子, 聡, 勝又, 英之, 西尾, 友志, 古川, 真衣
• Format: Journal Article
• Language: Japanese
• Published: Tokyo 公益社団法人 日本分析化学会 05.02.2019; Japan Science and Technology Agency
• Subjects: Drinking water; Electrodes; Error detection; Glass; Linearity; Lithium; Organic chemistry; pH; Rare earth elements; Sensitivity analysis; Yttrium
• ISSN: 0525-1931
• DOI: 10.2116/bunsekikagaku.68.103

In the present work, pH response glasses with excellent chemical durability and small resistance were fabricated, the when lithium concentration in a glass membrane increased, and rare earth metal (Sc, Y and La) oxides were added in the glass. We tried to construct a pH electrode with fabricated pH response glasses, and to evaluate it for the sensitivity, linearity, alkali error and response of tap water. Next, we prepared pH electrode capable of measuring a micro volume (50 μL) by using the optimum pH response glasses. The performance results of the developed pH electrode for a micro volume that satisfied the standard JIS. The developed pH electrode may become commercially available.