Figure 6c: Ultraviolet-visible spectra of the peaks from the electropherogram of pen A (blue line) overlaid with the ultraviolet-visible spectra of the best match from the spectral library searches (red line): 3.60 minutes; best match, Victoria Pure Blue BO, similarity = 0.9779. Nearly identical matches were obtained with Victoria Blue B and Victoria Blue R
Figure 6c: Ultraviolet-visible spectra of the peaks from the electropherogram of pen A (blue line) overlaid with the ultraviolet-visible spectra of the best match from the spectral library searches (red line): 3.60 minutes; best match, Victoria Pure Blue BO, similarity = 0.9779. Nearly identical matches were obtained with Victoria Blue B and Victoria Blue R.