Liquid chromatography–mass spectrometry analysis of cationic aniline dyes from the Technical University of Dresden Historical Collection of Dyes

Michael John Plater* (Corresponding Author), Andrea Raab, Horst Hartmann

*Corresponding author for this work

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Abstract

Liquid chromatography?mass spectrometry has been used to analyse a range of cationic aniline dyes from the 19th century. Mauveine from the Chandler museum is used as a standard for comparison. This consists of a typical W. H. Perkin mixture of mauveine A and B. Mauveine from a historic collection in Dresden is different and consists of mainly mauveine A and a monomethyl mauveine chromophore. Possible synthetic routes and its significance are discussed. Three samples of phenylated rosanilines have been analysed, and a list of 19 possible components compiled. An analysis by liquid chromatography?mass spectrometry works well on this complex mixture giving clear information on retention times and accurate mass molecular weights. Mono-, di- and triphenylrosanilines are present in two samples, and a third sample has mainly monophenylrosaniline. In each sample, a small amount of higher molecular weight homologues appear. The thin-layer chromatography plate, from left to right, has fuchsin or rosaniline then mono-, di- and triphenylrosaniline. The two spots on the right-hand side are blue, and the two spots on the left-hand side are red.
Original languageEnglish
Pages (from-to)326-335
Number of pages10
JournalJournal of Chemical Research
Volume44
Issue number5-6
Early online date27 Jan 2020
DOIs
Publication statusPublished - 1 May 2020

Keywords

  • aniline blue
  • fuchsin
  • mauveine
  • rosaniline
  • triphenylrosaniline

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