Fig. 3
From: Analytical characterization of 5,5′-dibromoindigo and its first discovery in a museum textile
Comparison of LC-DAD-ESI-MS analyses of extracts of the blue dyed yukata shown in Fig. 2 with indigoid reference materials. The data include chromatograms in column 1, UV–vis DAD spectra of the primary chromatographic peak in column 2, and FSMS spectra in column 3. Spectra presented were subjected to a baseline correction routine that included a two-range subtraction using the regions immediately before and after the occurrence of the chromatographic peak