Fig. 5: UPLC-QTOF-MS analysis of dye.
From: Scientific research and new evidence of the materials and craft of hard yellow paper
a Total ion flow diagram of the extraction of dye from sample 10481 under ESI+ of UPLC-QTOF-MS. b Molecular ion peak (a) and corresponding fragment ion peak (b) from sample 10481 in 5.15 min. c Molecular ion peak (a) and corresponding fragment ion peak (b) from sample 10481 in 4.51 min. d Molecular ion peak (a) and corresponding fragment ion peak (b) from sample 10481 in 3.71 min.
