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

Table 2

Color reagent, rhodamine B.

Compound	Volume ratio
Ammonium molybdate tetrahydrate (7.4 × 10^−3 M)	1
Rhodamine B (1 × 10^−3 M)	1
Sulphuric acid (0.6 N)	1
NaOCl solution (0.05 M)	1