Figure 3

Stress testing of VRC. Panel A is VRC standard solution that has not been subjected to any stress condition. Panels from B to D are samples that have been subjected to acid hydrolysis, alkali hydrolysis, oxidation, respectively. Red dotted tracing in panel D is the blank hydrogen peroxide solution without VRC. Chromatograms of the samples that have subjected to boiling and UV irradiation are identical with panel A.