Our proposal that museum stored mauveine was made by a modified method compared to mauveine made by the William Henry Perkin (WHP) patented method of 1856 is exemplified. An improved method of purification allows greater resolution and separation of the different mauveine chromophores. LC-MS charts for museum stored mauveine are compared to the new mauveine reported here. The formation of deprotected mauveine chromophores and N-tert-butylated mauveine chromophores is discussed.
Bibliographical noteWe are grateful to the EPSRC National Mass Spectrometry Foundation (NMSF) for mass spectra.
- liquid chromatography-mass spectrometry
- silica gel