Spectrophotometric Analysis of Phosphoric Acid Leakage in High-Temperature Phosphoric Acid-Doped Polybenzimidazole Membrane Fuel Cell Application. - Seungyoon Han; Yeon Hun Jeong; Ju Hae Jung; Alina Begley; Euiji Choi; Sung Jong Yoo; Jong Hyun Jang; Hyoung-Juhn Kim; Suk Woo Nam; Jin Young Kim 004 (J. Sensors, 2016)