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

Table 3

Color reagent, crystal violet.

Compound	Volume ratio
Ammonium molybdate tetrahydrate (1.2 × 10^−2 M)	1
Sulphuric acid (6.5 N)	1
Crystal violet solution (1 × 10^−3 M)	1