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 language | English |
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Pages (from-to) | 326-335 |
Number of pages | 10 |
Journal | Journal of Chemical Research |
Volume | 44 |
Issue number | 5-6 |
Early online date | 27 Jan 2020 |
DOIs | |
Publication status | Published - 1 May 2020 |
Keywords
- aniline blue
- fuchsin
- mauveine
- rosaniline
- triphenylrosaniline