Spectrophotometric Analysis of Phosphoric Acid Leakage in High-Temperature Phosphoric Acid-Doped Polybenzimidazole Membrane Fuel Cell Application

Table 1

Color reagent, molybdenum blue.

Compound	Quantity
Ammonium molybdate tetrahydrate	0.6 g
Potassium antimony tartrate hydrate	0.024 g
Deionized water	30 mL
Sulfuric acid (7.4 M)	10 mL
Ammonium sulfamate (0.44 M)	10 mL
L-Ascorbic acid (0.4 M)	10 mL