11:59 〜 12:01 [PS-11-13 (Late News)] Paper-based Potentiometric pH Sensor using Carbon Electrode Drawn by Pencil ○R. Kawahara1, P. Sahatiya2, S. Badhulika2, S. Uno1 (1.Ritsumeikan Univ. (Japan), 2.Indian Inst. of Tech. Hyderabad (India))