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

Table 4

Molar absorptivity of color reagents [28].

Color reagent	Molar absorptivity (M^−1 cm^−1)
Molybdenum blue	2.0 × 10^4
Brilliant green	0.88 × 10^5
Crystal violet	1.28 × 10^5
Malachite green	7.8 × 10^4
Rhodamine B	1.19 × 10^5
Servon red L	0.7 × 10^4